Title :
Offset Cancelling Circuit
Author :
Wiegerink, R.J. ; Seevinck, E. ; de Jager, W.
Author_Institution :
Faculty of Electrical Engineering, Twente University, P.O. Box 217, 7500 AE Enschede, The Netherlands.
Abstract :
An offset cancelling circuit to reduce the offset voltage at an integrated audio amplifier output is described. This offset voltage is detected using a low pass filter with a very large time constant. Only one small on-chip capacitor is needed. A value of 50 pF yields a - 3dB bandwidth of 5 Hz. The circuit was realized with a bipolar cell-based semicustom array.
Keywords :
Bandwidth; Capacitors; Frequency; Integrated circuit yield; Low pass filters; Mirrors; Resistors; Temperature distribution; Transconductance; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 1988. ESSCIRC '88. Fourteenth European
Conference_Location :
Manchester, UK
