AC Line Current Detector:
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Active feedback IC serves as current sensing
instrumentation amplifier: 07/24/03 EDN-Design
Ideas / High-speed current sensing presents
a designer with some significant challenges.
Most techniques for sensing current involve
measuring the differential voltage the
current produces as it flows through a sense
element, such as a resistor or a Hall-effect
device. The differential voltage across the
sense element is generally small and is
often riding on a common-mode voltage that
is considerably ..... |
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Analog input circuit serves any
microcontroller: 12/20/2001 EDN - Design
Ideas / The simple ADC in Figure 1 is
perfect for getting analog signals into a
purely digital microcontroller. Using just
five surface-mount parts, you can assemble
it for less than 50 cents (1000), which is
approximately half the cost of a
single-chip-ADC approach in the same volume.
Moreover, this design takes only one pin
from the microcontroller to operate. . |
Circuit Breaker Monitors Leakage Current:
06/21/01 EDN-Design Ideas / PDF contains
multiple circuits - scroll to find this
circuit.
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Circuit measures currents in dc servo motor:
12/06/2001 EDN - Design Ideas / The simple
circuit design in Figure 1 lets you measure
all components of a current flowing in a dc
servo motor. The rectified output of the
circuit uses ground as a reference, so you
can measure the output by using a
single-ended A/D converter. The
current-sense resistor, R1, has a value of
0. . |
Circuit Measures Small Current in DC Servo
Motor: 12/07/01 EDN-Design Ideas |
Circuit Senses High Side Current:
03/01/01 EDN-Design Ideas / (One of several
circuits in PDF) The accurate, high-side,
current-sense circuit does not use a
dedicated, isolated supply voltage, as some
other schemes do.
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Current Sense Amplifier Handles High
Voltages: 11/06/97 EDN-Design Ideas
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Current Sense IC Prevents Overcurrent Damage:
04/25/96 EDN-Design Ideas
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Current sensing scheme improves PFC on/off
sequences: 06/27/2002 EDN - Design
Ideas / PFC (power-factor-correction)
preconverters typically use the step-up, or
boost, configuration, because this type of
converter is relatively easy to implement
(Figure 1). However, this topology requires
the output voltage to be higher than the
input voltage. When this condition is not
the case—for example, with on/off sequences
or under load conditions—some inrush current
flows thro.... |
CurrentSensing for Crossbars: Maxim APP
391: Mar 01, 2001 / Current sharing between
DC/DC converter modules enables several
modules to be paralleled. In recent years,
tight tolerances for current sharing have
made discrete current-sense circuit designs
a formidable challenge. This application
note describes a low-cost, space-saving and
accurate current sensing and sharing scheme
using MAX4372.
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High Side Current Sensor has Period Output 1:
Maxim APP 1084: May 31, 2002
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High Side Current Sensor has Period Output 2:
03/07/02 EDN-Design Ideas / PDF contains
multiple circuits - scroll to find the one
of interest |
High side current sensor monitors negative
rail: 04/17/03 EDN-Design Ideas / All
dedicated current-sense amplifiers provide
high-side sensing on a positive supply, but
you can adapt such circuits for monitoring a
negative supply (Figure 1). The
positive-supply pin, V+, connects to the
system's positive supply, and the ground
pin, GND, connects to the negative supply,
VEE. That arrangement monitors the negative
supply and provides a positive output
voltage for the extern.. |
HighAccuracy CurrentSense Amplifier Enables
Current Sensing and Current Sharing:
Maxim APP 391: Mar 01, 2001 / Current
sharing between DC/DC converter modules
enables several modules to be paralleled. In
recent years, tight tolerances for current
sharing have made discrete current-sense
circuit designs a formidable challenge. This
application note describes a low-cost,
space-saving and accurate current sensing
and sharing scheme using MAX4372.
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Integrator Forms Picoammeter: 07/17/97
EDN-Design Ideas |
MOSFET Current Sensing: Method of mirror
current sensing a MOSFET
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Simple circuit provides high side current
sensing: 10/12/00 EDN-Design Ideas / PDF
contains multiple circuits - scroll to find
this circuit |
Solar Current Meter: |
Transmitter accurately transfers voltage
input: 05/15/03 EDN-Design Ideas / When
you connect remote sensors to a central
process controller, a simple, robust, and
commonly used interface is the 4 to 20-mA
loop. The advantages of this current loop
include the simplicity of just two twisted
wires that share both power and signal, the
loop's high noise immunity in harsh
environments, and the de facto loop standard
within the process-control industry... |
Two Sensors Measure Three Line Currents:
09/01/95 EDN-Design Ideas
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Voltage Reference improves JFET:
10/26/00 EDN-Design Ideas / PDF contains
multiple circuits - scroll to find this
circuit The common JFET current-source in
Figure 1a has average output impedance and
depends heavily on the JFET's V P and I DSS
variations. These manufacturing variations
limit the initial accuracy of the current
setpoint that the circuit can obtain with
a...
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