Simple Signal Tracer Injector Circuit Diagram


This is a simple signal tracer signal circuit diagram.This signal tracer injector has been designed to inject or detect a specific signal into an audio circuit, tracer may also be used as a simple monitor or amplifier. The injector is a CMOS oscillator with period approximately equal to 1 x Cl x R2 seconds. The values are given for 1 kHz operation. Read : G Purpose Preamplifier Circuit Diagram

 Simple Signal Tracer Signal Circuit Diagram


Simple Signal Tracer Signal Circuit Diagram


Resistors R3 and R4 divide the output to 1 V; Whereas the oscillator employs the gates in their digital mode, the tracer used them in a linear fashion by applying negative feedback from output to input. They are used in much the same way as op amps. 

Read:  Low-voltage Power Supply Circuit

The circuit uses positive ground. It offers an advantage at the earphone output because one side of the earphone must be connected to ground via the case. Use of a positive ground allows the phone to be driven by the two N-channel transistors inside the CD4001 which are arranged in parallel and are thus able to handle more current for better volume.

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