Differential transconductor with reduced temperature dependence

Details Differential transconductor with reduced temperature dependence Differential transconductor with reduced temperature dependence

1993-03-22

1995-02-28

Sikes, William L.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330289, 330296, G05F 100, G05F 500

Patent

active

053941128

ABSTRACT:
An integrated circuit transconductor stage which suppresses the dependence on temperature and production process variables of a differential transconductor stage. A negative feedback relation is used, where the output of the transconductor stage is connected to an additional current generator (which is referenced to a precision external resistor), to a capacitor, and also to the gate of a PMOS transistor which sources current to a polarization stage, which in turn sources current to the transconductor stage, or to multiple transconductor stages.

REFERENCES:
patent: 4723108 (1988-02-01), Murphy et al.
De Veirman et al., "Full-Integrated 5 to 15 MHZ Programmable Bipolar Bessel Lowpass Filter", Sep. 3, 1990, 1990 IEEE International Symposium on Circuits and Systems, pp. 1155-1158.
Glasford, "Current Developments in CMOS Gain-Stabalized Transconductance Amplifiers for High Frequency Bandpass Filter Applications", Jul. 12, 1983, IEEE International Symposium on Circuits and Systems, pp. 1282-1285.

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