Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1996-05-28
1998-10-13
Cunningham, Terry
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327539, 327545, G05F 110
Patent
active
058218076
ABSTRACT:
A differential voltage reference circuit implemented in CMOS provides a continuous differential voltage having good substrate and supply noise-rejection and low power consumption. The differential voltage reference is operable under a low voltage power supply in the range of 1-3 volts and does not require a large silicon die area. The differential voltage reference includes two parasitic bipolar transistors and a single differential summing amplifier. PTAT and CTAT differential signals are summed at the amplifier summing junctions to provide a temperature-independent differential reference voltage. The differential amplifier maintains a common-mode level of the output at a constant level with respect to a bias voltage at the bases of the two bipolar transistors.
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Todd L. Brooks and Alan L. Westwick, "A Low-Power Diferential CMOS Band Gap Reference," 1994 IEEE International Solid State Circuits Conference, pp. 248, 249.
Germano Nicollini and Daniel Senderowicz in, "A CMOS Band Gap Reference for Differential Signal Processing," IEEE Journal of Solid State Circuits, vol. 26, No. 1, Jan. 1991, pp. 41-43.
Analog Devices Inc.
Cunningham Terry
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