Document Type and Number:
Japanese Patent JPS5181541
Kind Code:
A
Abstract:
In a transistor amplifier circuit comprising a common-emitter amplifier transistor, a collector load resistance has one end connected with the collector of the transistor, a constant-current circuit is connected with the collector of the transistor, and an output of the transistor amplifier circuit is derived from the collector. The constant-current circuit supplies a constant current which is substantially equal to the d.c. emitter current flowing through the transistor and a d.c. voltage which establishes a d.c. voltage level of the output is applied to the other end of the collector load resistance, whereby no d.c. current is permitted to flow through the resistance.
Inventors:
SAKAMOTO YOSHIO
KOMINAMI YASUO
KOMINAMI YASUO
Application Number:
JP627175A
Publication Date:
July 16, 1976
Filing Date:
January 16, 1975
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H03F3/183; H03F1/02; H03F3/45; (IPC1-7): H03F3/04
Domestic Patent References:
| JPS467358A | ||||
| JPS4979149A | 1974-07-31 |