Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1979-12-27
1982-06-22
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330256, 330257, 330258, H03F 345
Patent
active
043365027
ABSTRACT:
To the respective drains of a pair of FET's which constitute an input stage differential amplifier circuit are cascade-connected a first transistor and a second transistor, respectively, whose bases are connected in common. To a pair of active elements of the next stage amplifier circuit is connected a detecting circuit for detecting the sum of the driving currents of these active elements. By the output of detection of the detecting circuit, the potential of the common base of the first and second transistors is controlled, so that the currents flowing through these first and second transistors are held constant, whereby the apparent load, for input signals, of the paired FET's is elevated.
REFERENCES:
patent: 3786362 (1974-01-01), Marsh et al.
Brokaw et al., "A Fast, High-Precision, Laser-Trimmed FET Input Operational Amplifier", 1974, IEEE International Solid-State Circuits Conferences, pp. 142, 143, 244, Feb. 14, 1974.
Mullins James B.
Nippon Gakki Seizo Kabushiki Kaisha
LandOfFree
Amplifier with input stage differential amplifying circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Amplifier with input stage differential amplifying circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amplifier with input stage differential amplifying circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-654948