Voltage amplification circuit

Details Voltage amplification circuit Voltage amplification circuit

2006-02-21

2006-02-21

Mottola, Steven J. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including plural stages cascaded

C330S311000

Reexamination Certificate

active

07002413

ABSTRACT:
A voltage amplification circuit is provided which is capable of faithfully amplifying an input signal even in an inverting amplifier placed in a second stage being DC-coupled to an inverting amplifier placed in a first stage. By DC-coupling the inverting amplifiers and by setting an amplifying operation starting input voltage in the inverting amplifier placed in the first stage to be lower than that in the inverting amplifier placed in the second stage, the voltage amplification circuit that can provide a large amplification factor is realized. By configuring so that a circuit to set a clamping voltage has substantially the same configurations as a circuit to set an amplifying operation starting input voltage in the inverting amplifier placed in the second stage, the voltage amplification circuit is obtained that can follow variations in parameters on manufacturing and provide a wide operating margin and operate in a stable manner even though variations in parameters on manufacturing or variations in a source voltage occur.

REFERENCES:
patent: 4184124 (1980-01-01), Asakawa
patent: 5745009 (1998-04-01), Leroux et al.
patent: 5966172 (1999-10-01), Tsunai
patent: 8-274559 (1996-10-01), None
patent: 2586393 (1996-12-01), None

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