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Speech processor - clipping and dynamic compression
To obtain the best modulation result of a transmitter you can use 2 ways: clipping and dynamic compression. Both methods have disadvantages: clipping - there is no constant signal carrier and so the transmitter has a tendency to be overmodulated or undermodulated and in dynamic compression degradation also happens because of the uncontrolled signal bursts [...]
Audio limiter circuit schematic
This audio limiter circuit is easy to build, works with BA741 8pins or 4pins so pay attention and uses a symmetrical power supply. When the audio input level is between 20mV and 20V the output will be a constant 25mV signal. Audio limiters can be used in a transmitter schematic or in any circuit you [...]
Audio compressor SSM2165
A very simple audio compressor built with SSM2165 IC. There is no much explication about this compressor circuit schematic, just pay attention at capacitors voltage. The C8 value depends of your desired frequency amplification. Mount 7805 on a heatsink if you use higher voltages.
Audio compressor circuit components:
