Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Nonlinear amplifying circuit
Patent
1995-04-19
1996-08-13
Cunningham, Terry
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Nonlinear amplifying circuit
327 78, 327310, 327313, 327375, 327379, 327484, 327491, 327563, G06G 712
Patent
active
055460453
ABSTRACT:
An integrated circuit output stage is intended for use with an operational amplifier. The output is capable of driving capacitive load to within a V.sub.SAT of the power supply rails. The complementary output transistors are driven by way of a combination of buffers and complementary differential amplifiers which act to bias the stage in class AB. The quiescent current is stabilized and controlled, in part, by simple resistor rationing. The output transistor saturation is sensed and a current limit is imposed so that hard saturation is avoided. Frequency compensation is achieved in a manner that responds to output transistor saturation so as to improve the high frequency transient response. Feedforward capacitors are also included to further improve high frequency response.
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Jeroen Fonderie, "Design of Low-Voltage Bipolar Operational Amplifiers", Nov. 18, 1991, pp. 144-187.
Motorola Semiconductor Technical Data Sheet, MC33201-including Figs. 1-25.
James A. Kuzdrall, "Drive SAR ADCs With Low-Z Buffer", Electronic Design, Oct. 12, 1989, pp. 75-78 and 80-81.
Cunningham Terry
National Semiconductor Corp.
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