Category Archives: Signal Processing

One-Shot Multivibrator

Posted on August 2, 2011 by Rend

A one shot multivibrator generate a fixed width pulse at the output when the input is triggered. This fixed width output should be consistent, regardless the width of the input trigger. One example of one shot multivibrator circuit is shown … Continue reading →

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Amplitude Modulator with OTA

Posted on July 20, 2011 by Rend

Circuit described in the schematic diagram below can achieve 99% modulation easily with maximum frequency of 200kHz. The amplification of this circuit can be controlled easily since the transconductance of an operational transconductance amplifier is directly propotional to the control … Continue reading →

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50 kHz FM Optical Receiver

Posted on May 23, 2011 by Rust

Frequency modulation (FM) can be used to transmit analog voltage level signal with good noise immunity. The transmission itself  might employs different methods, and this circuit uses free air optical medium. This optical receiver circuit is built using a L14G2 … Continue reading →

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