1KHz Sine Wave Generator:
Simple circuitry, Low distortion, battery
operated Variable, Low impedance output up to1V
RMS |
2MHz RF Oscillator:
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4 Transistor Transmitter:
|
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68HC11 Synthesizes Accurate Sine
Wave: 09/02/96 EDN-Design
Ideas |
Amplitude Stable Oscillator has
Low Distortion, Low Cost:
11/09/00 EDN-Design Ideas / PDF contains
multiple circuits - scroll to find this circuit |
Audio Test Oscillator:
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Basic RF Oscillator #1:
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CMOS Toggle Flip Flop With
Relay(CD4013): |
Convert periodic waveforms to
square waves:
08/16/2001 EDN - Design Ideas / Converting
periodic waveforms to square waves is an
integral part of extracting a clock signal from
data, creating waveform generators, and making
timing-pulse generators. Any
square-wave-conversion circuit is more valuable
when the square wave's duty cycle is variable
and controllable. Figure 1 shows a circuit that
has these attributes and can drive several TTL-compatible
loads.. |
Crystal Filter yields Pure Sine
Wave: 06/98 Intersol
Application Note # AN9815 |
Current Feedback Amp yields
Simple Oscillator:
06/08/95 EDN-Design Ideas |
DCC Waveforms and Voltages For
DCC Systems:
|
DDS and converter form signal
generator: 02/20/03
EDN-Design Ideas / Many applications require
low-frequency signal generators that can deliver
high-performance, high-resolution signals. This
Design Idea presents a circuit that generates
frequencies of 0 to 1 MHz. Sinusoidal,
triangular, and square-wave outputs are
available. You can achieve frequency resolution
of better than 0... |
DDS device produces sawtooth
waveform: 07/10/03
EDN-Design Ideas / Ramp or sawtooth waveforms
are useful for a broad range of applications,
including automatic-test equipment, benchtest
equipment, and actuator control. Discrete
components typically set the waveform frequency.
Unfortunately, drift in these component values
over time and temperature limits the accuracy of
the output frequency... |
DDS using AD9835:
|
Digital signal controls sine
generator: 05/15/03
EDN-Design Ideas / The circuit of Figure 1
produces an accurate, variable-frequency sine
wave for use as a general-purpose reference
signal. It includes an eighth-order elliptic,
switched-capacitor lowpass filter, IC3, which
uses a 100-kHz square-wave clock signal that
microcontroller IC2 generates. (Any other
convenient square-wave source is also
acceptable... |
Digital Signals Produce Pure Sine
Waves: 10/09/97 EDN-Design
Ideas |
Digital Sine-Wave Generator
Produces 0� To 360� Phase-Shifts:
12/04/00 Electronic Design - Ideas for Design /
Sine-wave generators with 0� to 360�
phase-shifts are very important testing blocks
in many systems involving DSP operations (i.e.,
I/Q modulator-demodulator communication,
phase-angle measurements and up-down counter
conversion in. . . |
Discrete BiStable Flip Flop: |
Discrete Set / Reset Flip Flop:
|
DTMF Coder Makes Low Cost Sine
Wave Generator:
10/13/94 EDN-Design Ideas |
Easily Tuned Sine Wave
Oscillators: National
Semiconductor Application Notes,28-Jun-1996
|
Edge Detector Runs off of Single
Supply: 12/04/97 EDN-Design
Ideas |
Edit and generate your own analog
stimulus waveforms:
10/12/98 Electronic Design - Ideas for Design /
In cases where low frequencies are acceptable, a
user-defined analog waveform can be generated
using the design presented. The circuit employs
a low-power 12-bit digital-toanalog converter (DAC)
connected to the parallel printer port of a
personal. . . |
FAST, High Current Pulser:
|
Few Extra Components Stabilize
Oscillator: 102/15/96
EDN-Design Ideas |
FIFO Makes Cheap Waveform
Generator: 12/21/95
EDN-Design Ideas |
Flash-ROM-based multichannel
arbitrary-waveform generator:
04/19/99 Electronic Design - Ideas for Design /
No means for waveform synthesis is more flexible
than the arbitrary waveform generator (AWG). In
this marriage of digital and analog, large
memory arrays that contain a separate datum for
each. . . |
FleaPower Oscillator Consumes
only 1 �A: 05/21/98
EDN-Design Ideas |
Flip Flop Flashers, Buzzers, Etc.:
|
Four Transistor Tracking
Transmitter: |
Gated Oscillator Emulates a Flip
Flop: 03/16/95 EDN-Design
Ideas |
Gates Provide Low Cost Sine Wave
Generator: 08/15/97
EDN-Design Ideas |
Generate An Analog Signal With a
�C: 10/22/98 EDN-Design
Ideas |
Harmonic oscillator:
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LC Oscillator has 1% THD:
03/31/94 EDN-Design Ideas |
linkwitz Cosine Burst Generator:
part of speaker measurement set described in the
construction article |
Load Pulser Tests Supply's
Transient Response:
04/11/96 EDN-Design Ideas |
Low Cost Function Generator:
|
Low Distortion Oscillator Starts
Fast: 05/26/94 EDN-Design
Ideas |
Low Distortion, Amplitude Stable
Sine Wave Oscillator: |
Low Frequency Sine Wave Generator:
The two circuits below illustrate generating low
frequency sine waves by shifting the phase of
the signal through an RC network so that
oscillation occurs where the total phase shift
is360 degrees. |
Microcontroller-based sine-wave
generator has crystal accuracy:
12/14/98 Electronic Design - Ideas for Design /
One way to generate a sine wave is to pass a
square wave through a low-pass filter. The
high-order harmonics will be filtered out,
leaving only the fundamental. The higher the
order of the filter, the purer the sine wave
produced. The MAX292. . . |
Microphone Circuit Test
Oscillator: 440 Hz
Tone generator for testing XLR microph1-lines
|
MonoStable Flip Flops (One Shot):
|
Negatrons Enrich Filter,
Oscillator Designs:
07/21/94 EDN-Design Ideas |
New stable RC pulse generator:
02/08/99 Electronic Design - Ideas for Design /
Few circuits are more commonplace than the basic
squarewave-output astable multivibrator
illustrated in Figure 1. Useful whenever a
relatively. . . |
Occasional Pulse Circuit: |
OpAmp Oscillators Simplify RF
Designs: 10/10/96 EDN-Design
Ideas |
Oscillator Lowers Distortion &
Phase Noise: 08/18/94
EDN-Design Ideas |
Oscillator turns on Instantly,
off Synchronously:
05/23/96 EDN-Design Ideas |
Oscillator, 2MHz.:
Fair Warning: this site has pop-up ads |
Parallel port controls arbitrary
waveform generator:
06/13/2002 EDN - Design Ideas / You can use the
parallel port of your PC and a few additional
components to generate a powerful, easy-to-use
arbitrary-waveform generator. By using a Visual
Basic program with the circuit in Figure 1, you
can generate any waveform (for example,
sinusoid, triangle, amplitude- or
frequency-modulated, or exponential decay) by
simply entering its characteristic equation.. |
Parallel port controls arbitrary
waveform generator:
06/13/2002 EDN - Design Ideas / You can use the
parallel port of your PC and a few additional
components to generate a powerful, easy-to-use
arbitrary-waveform generator. By using a Visual
Basic program with the circuit in Figure 1, you
can generate any waveform (for example,
sinusoid, triangle, amplitude- or
frequency-modulated, or exponential decay) by
simply entering its characteristic equation.. |
PC Controls inexpensive Waveform
Generator: 06/05/96
EDN-Design Ideas |
Precise Triangle Wave Generation:
National Semiconductor Application
Notes,28-Jun-1996 |
Precision Waveform Converter uses
Sawtooth Wave:
03/01/96 EDN-Design Ideas |
Programmable oscillator uses
digital potentiometers:
03/07/2002 EDN - Design Ideas / Digital
potentiometers are versatile devices; you can
use them in many filtering and
waveform-generation applications. This Design
Idea describes an oscillator in which setting
the resistance of two digital potentiometers
independently programs the oscillation amplitude
and frequency. Figure 1 shows a typical
diode-stabilized Wien-bridge oscillator that
generates accurate sine waves fro... . |
Programmable Ramp Generator has
14 Bit Linearity:
09/12/96 EDN-Design Ideas |
Pulse Generator:
Fair Warning: this site has pop-up ads |
Pulse Generator:
|
Pulse Generator & Signal Tracer:
Dual-purpose test-instrument Very simple
Circuitry,1.5 Volt Battery-operated
|
Pulse Generator Verifies Test
Setups: 05/26/94 EDN-Design
Ideas |
Pulse Generator, 555: Fair
Warning: this site has pop-up ads |
Pulse Stretcher Increases ECL
Gate Gains: 01/20/94
EDN-Design Ideas / stretches the output pulses
of an ECL comparator by operating the ECL line
receivers with unusually large pulldown
resistors to the -15V supply. The large load
resistance maximizes the gains of the
emitter-follower output stages and speeds up the
rising edges. At the same Time, the low pulldown
current, together with the input and wiring
capacitances, slows the falling edges. These
actions stretch the positive pulses by
approximately2 nsec/stage. |
Pulse Width Adjuster Reverses
Servo Motor: 03/17/94
EDN-Design Ideas |
Pulse Width Trimmer Outdoes One
Shots: 03/03/97 EDN-Design
Ideas |
Pulsed Sensor Extends Battery
Life: 01/01/98 EDN-Design
Ideas |
:
10/03/2002 EDN - Design Ideas / A
current-feedback amplifier is a well-known
component with many uses. Its basic block
diagram shows that its input stage is a voltage
follower—in practice, a symmetrical emitter
follower (Figure 1). The configuration samples
the output current, converts it to voltage
across a large impedance, and amplifies it to
the output using a high-power,
low-output-impedance amplifier.. |
Sawtooth Generator Spans a 70 DB
Range: 07/07/94 EDN-Design
Ideas |
Scheme yields Frequency Locked
Triangle Waves:
02/02/98 EDN-Design Ideas |
Self Oscillating Amplifier for
Distortion Testing:
allows the home constructor to make quite
accurate measurements, without having to spend a
lot of money on a low distortion oscillator
|
Simple Circuit Generates +3.3 V
At 1 A From –5 V:
05/24/04 Electronic Design - Design Briefs /
Figure 1 depicts a circuit that uses
pulse-frequency modulation (PFM) to generate
+3.3 V from a −5-V power supply without the need
for a transformer. It's ideal for applications
that have a stable. . . |
Simple Circuit Generates Clean
Sine Waves: 06/19/97
EDN-Design Ideas |
Simple Compensation Extends
Oscillator's Range:
12/05/96 EDN-Design Ideas |
Simple Sinewave Generator: |
Simple sine-wave generator has no
low- or high-pass filters:
05/25/98 Electronic Design - Ideas for Design /
Generating sine waves with controlled
frequencies over a wide range is difficult when
using RC or LC sinusoidal oscillators. However,
this performance can be simply created using a
wideband digital squarewave oscillator, a
counter, and a weighted. . . |
Simple Technique Generates
Precise HART Waveforms
: 07/22/02 Electronic Design -
Ideas for Design / Designed to complement
conventional 4- to 20-mA analog signaling, the
Highway Addressable Remote Transducer (HART)
protocol supports two-way digital communications
for process measurement and control devices. The
protocol uses frequency-shift keying... |
Sine Wave Generation Techniques:
National Semiconductor Application
Notes,04-Nov-1995 |
Sine Wave Generator: |
Sine Wave Generator With Crystal
Accuracy: |
Sine Wave Generator With Crystal
Accuracy:
|
Single Chip Digital Sine Wave
Generator:
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Smooth Tone Clickless CW SideTone
Generator: This
circuit is about as good as it gets for
generating Morse code tones. It may be used as a
code practice oscillator, a Tone generator for a
keyer, or a SideTone oscillator for a
transmitter. |
Soft On / Off Switch:
Modern electronic equipment incorporates
"push-to-on-push-to-off" switches that do not
make the clicking noise as with old equipment.
An example of this is the power button on an ATX
computer cabinet. Here is a circuit that does
the same. It can be used to turn on/off any
electronic/electrical equipment that operates on
any range of voltages. FAIR WARNING -- THIS SITE
HAS ANNOYING POP UP ADS. |
Square wave modulator has
variable frequency and pulse width:
08/08/2002 EDN - Design Ideas / A few
years ago, I worked at a disk-drive company. We
had a plating facility that required square
waves to drive the high-voltage plating
operation. The challenge was that the square
wave's pulse width had to be variable, along
with the duty cycle. Also, the amplitude of the
pulses had to be adjustable.. |
Square Wave Oscillator: |
Square Wave to Sine Circuit: |
Summer Linearizes Ramp & Triangle
Generators: 12/08/94
EDN-Design Ideas |
Swept sine oscillator has
quadrature output:
08/18/97 Electronic Design - Ideas for Design /
Signals with a know frequency but unknown phase
may be detected using an in-phase and a 90�
shifted reference signal, as frequently used in
lock-in amplifiers, synchronous detectors, and
frequency-response analyzers. The 90�-shifted
signal. . . |
SwOpAmp Makes Square Wave
Generator: 02/15/96
EDN-Design Ideas |
Time Domain Reflectometer:
|
Time Domain Reflectometer (TDR): |
Tiny Programmable Oscillator
Operates From 5 kHz To 20 MHz:
08/06/01 Electronic Design - Ideas for Design /
By merging a digital potentiometer with an
oscillator chip, a very small programmable
oscillator (1 �MAX and one SOT-23 package) can
be realized. In addition to consuming very
little board space, the circuit requires only
three signals from a. . . |
Transconductance amp gives
oscillator reciprocal response:
04/17/03 EDN-Design Ideas / The circuit in
Figure 1 is a variation on the familiar
integrator/comparator triangle-wave oscillator,
which you typically implement with two op amps.
An integrator and a comparator connect in a
positive-feedback loop; the comparator drives
the integrator and vice versa. A fixed amount of
hysteresis exists in the comparator, producing a
triangle wave at the integrator's output... |
Tri Waveform Generator: |
Triangle & Square Wave Generator: |
Triangle / Square wave Generator:
|
Triangle Waveform Generator: |
Triangle/square-wave oscillator
serves dual purpose:
11/22/99 Electronic Design - Ideas for Design /
In conventional triangular-wave oscillators,
hysteresis from positive feedback in the Schmitt
trigger determines the voltage levels and
amplitude of the triangular waves. With this
topology, it’s. |
Twin T Audio Sine Wave Oscillator: |
UHF Oscillator:
|
Variable Gain Control Produces
Pure Sine Wave:
10/27/94 EDN-Design Ideas |
Voltage Controls Sine Wave
Frequency: 08/17/95
EDN-Design Ideas |
Waveform Conversion:
sine to square and square to sine
|
Waveform Generator Demodulates FM
Signals: 10/10/96 EDN-Design
Ideas / PDF contains multiple circuits - scroll
to find this circuit |
Waveform generator produces
biological-stimuli signals:
05/01/97 Electronic Design - Ideas for Design /
Electrical simulators are widely used in
biological research for the study of evoked
potentials in man and other applications.
Indeed, versions are on sale in local health
stores or via mail order for treatment of pain.
However, for the stimulation to. . . |
Wein Bridge Oscillator:
|
Wein Bridge Oscillator is Reborn:
06/13/02 EDN-Design Ideas / In 1940, William
Hewlett and David Packard launched a product
from a garage. product was a Wien-bridge
oscillator. It consisted of a single-pole
highpass filter in series with a single-pole
lowpass filter. |
Wein Bridge Oscillator keeps THD
Below One PPM:
11/10/94 EDN-Design Ideas / The Wien-bridge
sine-wave oscillator uses a light bulb to
stabilize its amplitude. The circuit doesn't
have a light bulb; it sports several
enhancements that lower its distortion and
generate a test signal pure enough for testing
modern op amps and high-resolution A/D
converters. |
Wein Bridge Theremin: |
WiFi Can Antenna: |