Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Nonlinear amplifying circuit
Patent
1994-11-29
1996-03-05
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Nonlinear amplifying circuit
327541, 327543, 330253, 330261, H03K 1716, H03F 345
Patent
active
054971209
ABSTRACT:
A differential amplifier circuit is obtained in which an operating power source voltage is suppressed to a minimum necessary level. The differential amplifier circuit includes a bias circuit having a differential amplifier with NMOS transistors (11A, 11B, 12A and 12B) and PMOS transistors (13A and 13B). Sources of NMOS transistors (11A)and (11B) are commonly grounded. A bias voltage (VB1) is supplied to gates of the NMOS transistors (11A) and (11B). Drains of the NMOS transistors (11A) and (11B) are connected to sources of NMOS transistors (12A) and (12B), respectively. A gate and a drain of the NMOS transistor (12A) are short-circuited to each other with the drain connected to a drain of a PMOS transistor (13A). A bias voltage (VB4) is applied to a gate of the NMOS transistor (12B). A drain of the NMOS transistor (12B) is connected to a drain of the PMOS transistor (13B) whose gate and drain are shared by each other. Gates of the PMOS transistors (13A) and (13B) are connected to a bias terminal (72) while sources of the PMOS transistors (13A) and (13B) are commonly connected to a power source. The bias terminal (72) is connected to an input bias terminal of a differential amplifier.
REFERENCES:
patent: 5061862 (1991-10-01), Tamagawa
patent: 5065046 (1991-11-01), Mok
patent: 5124580 (1992-06-01), Matthews et al.
patent: 5187448 (1993-02-01), Brooks et al.
patent: 5202645 (1993-04-01), Phan et al.
patent: 5367201 (1974-11-01), Hedberg
Ito Masao
Miki Takahiro
Callahan Timothy P.
Englund Terry L.
Mitsubishi Denki & Kabushiki Kaisha
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