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Cell Phones / Wireless Phones Circuits

Cell-Phone-Controlled Audio/Video Mute Switch

Cellular Phone calling Detector:  Flashes a LED when detecting an incoming call.  Powered by one 1.5V cell

Cordless Phone Backup

Dualvoltage Supply Powers SIM Card:  01/20/00 EDN-Design Ideas / PDF contains multiple circuits - scroll to find this circuit.

Mobile Cellphone Charger

Tiny Efficient High Power LED Camera Flash Solutions for CellPhone Applications:  Linear Technology Design Note 1009

Passive filter cleans up power line communications: 09/20/2001 EDN - Design Ideas / Many applications require the design of custom analog filters (Reference 1). The application for this design required simple and low-cost I/O filters for PLC (power-line communications), where low power consumption is a crucial factor. Figure.

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