Differential amplifier using voltage level shifting to achieve r

Details Differential amplifier using voltage level shifting to achieve r Differential amplifier using voltage level shifting to achieve r

1989-02-10

1990-04-17

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330255, 330258, 330261, H03F 345

Patent

active

049183982

ABSTRACT:
A differential amplifier coupled between sources of a high supply voltage (V.sub.HH) and a low supply voltage (V.sub.LL) contains a pair of differential portions (30 and 32) that are used to amplify a differential input signal (V.sub.11 and V.sub.12). One of the differential portions is turned on when the common-mode voltage of the input signal is in a portion of the supply range extending up to the high supply voltage. The other is turned on when the input common-mode voltage is in a portion of the supply range extending down to the low supply voltage. A level-shift circuit (38, 40, 42, 44, and 46) selectively raises or loweres the voltages at input points (P1, P2, P3, and P4) to the differential portions. The level shifts extend the conductive ranges of the differential portions. This enables the amplifier to achieve rail-to-rail input capability down to 1 volt or slightly less for the power supply voltage.

REFERENCES:
patent: 4357578 (1982-11-01), Yokoyama
patent: 4463319 (1984-07-01), Kearney
patent: 4471321 (1984-09-01), Bowers
patent: 4502020 (1985-02-01), Nelson et al.
patent: 4532479 (1985-07-01), Blauschild
patent: 4555673 (1985-11-01), Huijsing et al.
patent: 4725790 (1988-02-01), Addis et al.
patent: 4742309 (1988-05-01), Chu
Huijsing et al., "Low Voltage-Operational Amplifier with Rail-to-Rail Input and Output Ranges", IEEE Journal of Solid-State Circuits, vol. SC-20, No. 6, Dec. 1985, pp. 1144-1150.
"Operationsverstarker" Radio Fernshenen Elektronik, Berlin 36, No. 7, 1987, pp. 469-470.

Affiliated with

Also associated with

Rating

Differential amplifier using voltage level shifting to achieve r does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Differential amplifier using voltage level shifting to achieve r, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential amplifier using voltage level shifting to achieve r will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1055268