Amplifier circuit with a shared current source

Details Amplifier circuit with a shared current source Amplifier circuit with a shared current source

2005-08-02

2005-08-02

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including plural stages cascaded

C330S310000

Reexamination Certificate

active

06924703

ABSTRACT:
An amplifier circuit with a shared current source a first amplifier, a second amplifier and a current source. The output of the first amplifier (10) is coupled to the current source (30). When the second amplifier (20) is cascaded onto the first amplifier (10), the current source (30) is also connected to the second amplifier (20), such that these two amplifiers can share a common drive current, so the power dissipated by these two amplifiers is greatly reduced. This technique is implemented with Class A amplifiers, Class B amplifiers, Class AB amplifiers or a combination of the above amplifiers in cascade.

REFERENCES:
patent: 5530405 (1996-06-01), Rydel
patent: 6147559 (2000-11-01), Fong
patent: 6246290 (2001-06-01), Morrish et al.

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