Electronic circuit for converting a differential signal into a s

Details Electronic circuit for converting a differential signal into a s Electronic circuit for converting a differential signal into a s

1996-08-12

1998-06-02

Callahan, Timothy P.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330 69, 327561, 327361, H03F 345

Patent

active

057606480

ABSTRACT:
A differential-to-single-ended converter comprising a resistor network (205) and an operational amplifier is introduced. In comparison to prior art converters, a resistor (250) placed between the non-inverting input (264) of the operational amplifier (260) and the negative input terminal (202) of the converter (200). The common mode voltage (V.sub.nii ') at the non-inverting input (264) does not depend on the differential input voltage (V.sub.in.sup.#) of the converter (200) and has low fluctuations. This allows the use of an operational amplifier (260) with low CMRR and makes the converter (200) suitable for low voltage applications.

REFERENCES:
patent: 3761831 (1973-09-01), Foerster
patent: 4037170 (1977-07-01), Richards
patent: 4206416 (1980-06-01), Kellogg
patent: 4525677 (1985-06-01), Rorden
patent: 4782305 (1988-11-01), Westwick et al.
patent: 5300896 (1994-04-01), Suesserman
patent: 5424677 (1995-06-01), Carson
patent: 5481225 (1996-01-01), Lumsden et al.

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