Differential stage particularly for active filters

Details Differential stage particularly for active filters Differential stage particularly for active filters

1984-05-21

1987-04-28

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330257, 330311, H03F 345

Patent

active

046617809

ABSTRACT:
Differential stage comprising a high input dynamic range differential circuit formed by first and second transistors whose emitter electrodes are connected together and to a constant current source through respective resistors, their base electrodes having an input signal applied thereto, and their collector electrodes supplying respective collector currents. The stage further comprises a dual-single converter circuit receiving the collector currents at its input and supplying a stage output current, said converter circuit including at least one variable current source and having a conversion factor which varies as a function of the variable source current.

REFERENCES:
patent: 3873933 (1975-03-01), Wheatley, Jr.
patent: 4274061 (1981-06-01), Kraemer
patent: 4464632 (1984-08-01), Yoshihisa et al.
Reimer, "Rauscharme Operationsverstarker Orschlieben Neue Anwendungen", Electronik 21, Oct. 23, 1981, pp. 71-78.
Voorman et al., "Integration of Anawg Filters in a Bipolar Process", Journal of Solid State Circuits, vol SC-17, No. 4, Aug. 1982, pp. 713, 714, 716-722.

Affiliated with

Also associated with

Rating

Differential stage particularly for active filters 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 stage particularly for active filters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential stage particularly for active filters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-479369