JPH01119205U

JPH01119205U -

Info

Publication number: JPH01119205U
Application number: JP17032488U
Authority: JP
Priority date: 1988-12-28
Filing date: 1988-12-28
Publication date: 1989-08-11

Description

[Brief explanation of the drawing]

第１図は既知の増幅回路を示す電気回路図；第
２図は本考案による増幅回路の一実施例を示す電
気回路図；第３図は第２図の増幅回路の変形例を
示す電気回路図；そして第４図は本考案による増
幅回路を具える直結回路の電気回路図である。Ｑ_１１，Ｑ_１２，Ｑ_２１〜Ｑ_２４，Ｑ_３１〜Ｑ
_３８……トランジスタ、ＩＣ_１１，ＩＣ_１２，Ｉ
Ｃ_２１〜ＩＣ_２５，ＩＣ_３１〜ＩＣ_３３……定電
流回路、ＲＬ……負荷。 FIG. 1 is an electric circuit diagram showing a known amplifier circuit; FIG. 2 is an electric circuit diagram showing an embodiment of the amplifier circuit according to the present invention; FIG. 3 is an electric circuit diagram showing a modification of the amplifier circuit in FIG. 2. FIG. 4 is an electrical circuit diagram of a direct connection circuit including an amplifier circuit according to the present invention. Q ₁₁ , Q ₁₂ , Q ₂₁ ~Q ₂₄ , Q ₃₁ ~Q
₃₈ ...transistor, IC ₁₁ , IC ₁₂ , I
_C21 to _IC25 , _IC31 to _IC33 ...constant current circuit, RL...load.

Claims

[Claims for Utility Model Registration] 1. An input terminal connected to a signal voltage source having a certain impedance; a first transistor whose base is connected to the input terminal and whose emitter is grounded; and a collector of the first transistor. a positive or negative power input terminal connected to the collector of the first transistor via the first constant current circuit;
An emitter is connected between the constant current circuit of the first
a second transistor complementary to the transistor; a second transistor connected to the base of the second transistor;
a bias voltage source that supplies a bias voltage having a value between the power supply voltage on the side of the first constant current circuit and the ground voltage to the transistor; a negative or positive power input terminal connected; a signal output terminal connected between the collector of the second transistor and the second constant current circuit and supplying a signal to the load; a phase compensation element connected between the collector and the base of the first transistor; An amplifier for a direct-coupled circuit, characterized in that the current is greater than the set current of the constant current circuit on the power input terminal side. 2. In the amplifier circuit according to claim 1, of the first and second constant current circuits, the set current of the constant current circuit on the positive power input terminal side is changed from the set current of the constant current circuit on the negative power input terminal side. This is an amplifier circuit for direct connection circuits, which is characterized by being set to about twice the power of the amplifier.