Here Can You Find A Schematic of A Audio Compressor Limiter - Compressor Limiter 01 of 07.
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HERE CAN YOU FIND THE SCHEMATIC OF A COMPRESSOR LIMITER 01 OF 07.



THE AUDIO COMPRESSOR LIMITER:

This audio processor circuit features the SSM2045 IC which was developed specially for electronic music applications and the 741 opamp IC. The circuit is configured as a low pass filter with a DC voltage control for gain. The input signal is set to a working level of 150 mV pp through the resistor R1.

HOW DOES THIS AUDIO COMPRESSOR LIMITER WORK:

The filter has 2 buffered outputs the 2-pole output at pin 1 and 4-pole output at pin 8. Internally, the outputs are connected to 2 voltage-controlled-amplifiers (VCA). The R15 and R16 are connected to these outputs to achieve optimum offset and control voltage suppression. P4 is the volume control. The current that flows to the pins 15 and 16 should not go beyond the maximum of 250 A. The balance of the two VCAs and the entire filter is being controlled be a voltage range of - 250 mV to + 250 mV at pin 14. This voltage can be set by P2. The input can be driven with source impedances up to a maximum of 200 Ω. With an input level of 0dBm, the VCA weakens by 6 dB. The bias current needed at pin 17 is between 120 A and 185 A. The cutoff frequency can be shifted between 20 Hz and 20 kHz with a variable voltage at pin 5. This can be varied through P1. The capacitor values were selected to give the filter its Butterworth characteristics. The output current of the SSM2045 IC is converted to a voltage output by the 741 opamp. Any subsequent circuit must be DC decoupled from IC2. The noise voltage ration is about 80 dB.
Schematic From A Audio Compressor Limiter 01 of 07.

SCHEMATIC AUDIO COMPRESSOR LIMITER 01 OF 06





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