Differential amplifier operable in wide range

Details Differential amplifier operable in wide range Differential amplifier operable in wide range

2007-07-24

2007-07-24

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S257000, C330S261000, C330S269000

Reexamination Certificate

active

10801004

ABSTRACT:
Differential amplifier includes a differential amplifier circuit, a bias circuit and an output circuit. The differential amplifier circuit includes first and second differential amplifier sections. The first differential amplifier section includes a first PMOS transistor which has a source connected with a power supply line, and a first pair of PMOS transistors which have sources connected with a drain of the first PMOS and gates respectively receiving first and second input voltages. The second differential amplifier section includes a first NMOS transistor which has a source connected with a ground line, and a second pair of NMOS transistors which have sources connected with a drain of the first NMOS and gates respectively receiving the first and second input voltages. The bias circuit activates one of the amplifier sections in response to a control signal. The output circuit outputs an output signal from an output of the activated differential amplifier section.

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