Title :
A low-current DC-coupled compander
Author :
Susak, D.M. ; Bader, S.K. ; Gomez, M.L.
Author_Institution :
Motorola, Tempe, AZ, USA
Abstract :
A compander that uses DC-coupling, a fixed 1.5-V reference, a class-B variable-gain stage, and a class-AB amplifier output stage capable of swinging within a saturation voltage of supply and ground is described. Implementation of the design on a standard 20-V bipolar process yields channel separation of -64 dB for the compressor and -80 dB for the expander, a power supply rejection of -46 dB, and a drain current of 1.2 mA. The application requires six 1 mu F surface-mount capacitors and takes advantage of thin-film resistor technology for critical matching requirements.<>
Keywords :
bipolar integrated circuits; compandors; 1 muF; 1.2 mA; 1.5 V; 20 V; DC-coupling; class-AB amplifier output stage; class-B variable-gain stage; compander; fixed 1.5-V reference; matching; standard 20-V bipolar process; surface-mount capacitors; thin-film resistor technology; Capacitors; Circuits; Equations; Filters; Frequency; Pins; Power supplies; Rectifiers; Resistors; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 1993. Digest of Technical Papers. 40th ISSCC., 1993 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0987-1
DOI :
10.1109/ISSCC.1993.280020
