Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Patent
1997-11-12
2000-06-20
Shingleton, Michael B
Amplifiers
With semiconductor amplifying device
Including push-pull amplifier
330267, 330268, H03F 330
Patent
active
06078220&
ABSTRACT:
A complementary class AB current mirror circuit with a constant current gain which, when driven by a transconductance amplifier, provides a constant overall voltage gain over a wide range of output current. Such current mirror circuit includes cross-coupled pairs of current mirror circuits, both of which are driven by a common reference current and each of which selectively receives a respective portion of the input signal current. The upper pair of current mirror circuits includes: an input current mirror circuit which generates a drive current for the output stage of the lower pair of current mirror circuits; and an output current mirror circuit which generates the source, or "push," portion of the output signal current. The lower pair of current mirror circuits includes: an input current mirror circuit which generates a drive current for the output stage of the upper pair of current mirror circuits; and an output current mirror circuit which generates the sink, or "pull," portion of the output signal current.
REFERENCES:
patent: 4570128 (1986-02-01), Monticelli
patent: 4814723 (1989-03-01), Botti
patent: 5442320 (1995-08-01), Kunst et al.
patent: 5444419 (1995-08-01), Honda
patent: 5485123 (1996-01-01), Kiehl
patent: 5521553 (1996-05-01), Butler
Doug Smith, Mike Koen and Arthur F. Witulski, "Evolution of High-Speed Operational Amplifiers", IEEE Journal of Solid-State Circuits, vol. 29, No. 10, Oct. 1994, pp. 1166-1179.
National Semiconductor Corporation
Shingleton Michael B
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