Simple CATV Upstream Fiber Optic Receiver Uses DC Pilot AGC: 01/20/03 Electronic Design - Ideas for Design / Upstream fiber links in a community antenna television (CATV) system are usually among the most difficult elements of...
Thursday, June 29, 2006
Wednesday, June 28, 2006
Tracking ADC
A third variation on the counter-DAC-based converter theme is, in my estimation, the most elegant. Instead of a regular "up" counter driving the DAC, this circuit uses an up/down counter. The counter is continuously clocked, and the up/down...
Tuesday, June 27, 2006
Buffer circuits
300V PEAK TO PEAK SIGNAL GENERATOR (54) (300vpp) This circuit converts a square wave signal to a +-150 volt output signal with fast 100nS rise and fall tim...
Bridge circuits
16w bridge amplifier Circuit adds programmability to sensor amplifier: Design Ideas / The pressure-sensor amplifier circuit of Figure 1 offers...
Monday, June 26, 2006
Cell Phone
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...
Sunday, June 25, 2006
Inverter Circuits
12 Volt Automotive Inverter : This circuit will allow you to operate small devices like laptop computers inside your automobile without an expensive automobile power supply. The circuit takes advantage of the fact that power...
Sunday, June 18, 2006
Microcontroller schematics
Programmer for the 68HC705C8 MicroController Programmer PIC16F84,12C50x and EEPROM 24Cxx PS/2 keyboard keystroke logger based on Atmel 89C2051 ...
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