Transistor amplifying circuit for preventing the operation of an

Details Transistor amplifying circuit for preventing the operation of an Transistor amplifying circuit for preventing the operation of an

1979-06-26

1981-08-25

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330265, 330267, 330293, 330296, 330307, H03F 345, H03F 318, H03F 142

Patent

active

042862272

ABSTRACT:
The cut-off frequency of a transistor drops remarkably when the collector-emitter voltage of the transistor is driven into the quasi-saturation region of about 1 V. To prevent this problem, the collector-emitter voltage of the transistor is detected and compared with a predetermined reference voltage by comparison-limiting means. The comparison-limiting means limits the base current of the transistor and thus restricts the drop in the collector-emitter voltage. Limiting the voltage drop in this manner prevents the transistor from being driven into the quasi-saturation region. The reference voltage is set to the p-n junction voltage in the forward direction. Hence, the drop in the collector-emitter voltage is limited to a value near this reference voltage.

REFERENCES:
patent: 3482111 (1969-12-01), Gunderson et al.
patent: 4118640 (1978-10-01), Ochi et al.

Affiliated with

Also associated with

Rating

Transistor amplifying circuit for preventing the operation of an does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transistor amplifying circuit for preventing the operation of an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transistor amplifying circuit for preventing the operation of an will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1161006