Voltage gain amplifier for converting a single input to a differ

Details Voltage gain amplifier for converting a single input to a differ Voltage gain amplifier for converting a single input to a differ

1996-09-24

1998-09-08

Mullins, James B.

Amplifiers

With periodic switching input-output

330 51, 330 86, 330260, 330282, 330301, H03F 345

Patent

active

058050191

ABSTRACT:
The present invention relates to a voltage gain amplifier for converting a single analog input to a differential output and controlling a voltage gain, comprising a single input charging/discharging part, a differential output operational amplifier, a first and second input voltage transferring part, a first and second voltage holding part and a frequency compensating part, and therefore, making it possible to generate a differential input signal, which is used as an input to an ADC(Analog-to-Digital Converter) of an audio CODEC(Coder/Decoder), by using a fully-differential output operational amplifier whose output is transmitted as a differential output. Also, the present invention gives an advantage of making the chip size smaller than the prior art does, resulting from the fact that resistors are replaced by capacitors and switches when integrated into a chip.

REFERENCES:
patent: 4574250 (1986-03-01), Senderowicz

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