Integrated compression amplifier having programmable...

Details Integrated compression amplifier having programmable... Integrated compression amplifier having programmable...

H - Electricity

03

F

330/36

H03F 1/38 (2006.01) H03G 7/08 (2006.01) H04R 25/00 (2006.01)

Patent

CA 2000434

ABSTRACT OF THE DISCLOSURE An integrated compression amplifier that can be constructed in CMOS technology and whose threshold voltages are programmable. The compression amplifiers can be built into a multi-channel AGC device, so that the circuit can be co-integrated on a "switched capacitor" filter chip in CMOS technology. The compression amplifier circuit essentially involve a feedback amplifier whose gain is controlled by the output amplitude. To this end, an amplifier SC having variable gain constructed as a "switched capacitor" amplifier, a rectifier unit GR' as well as a low-pass filter TP' are in a feedback branch and a two quadrant multiplier ZM1 is connected between the input and output Ue', Ua' of the compression amplifier. The output of the lo-pass filter TP' is thereby fed back onto the control input of the two quadrant multiplier ZM'.

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