JPH0392854U

JPH0392854U -

Info

Publication number: JPH0392854U
Application number: JP68290U
Authority: JP
Priority date: 1990-01-09
Filing date: 1990-01-09
Publication date: 1991-09-20

Description

[Brief explanation of drawings]

第１図は本考案の第１の実施例を示す加入者線
インタフエース回路の回路図、第２図は従来の加
入者線インタフエース回路の回路図、第３図は第
２図の動作波形図、第４図は第１図の動作波形図
、第５図は本考案の第２の実施例を示す加入者線
インタフエース回路の回路図、第６図は第５図の
動作波形図である。３１……電話機、３２，３３……通信回線、４
０，４０Ａ……集積化部分、４１，４２……第１
、第２の出力パワートランジスタ、４３，４４…
…第１、第２の駆動回路、４５，４７……容量、
４６……制御回路。 Fig. 1 is a circuit diagram of a subscriber line interface circuit showing a first embodiment of the present invention, Fig. 2 is a circuit diagram of a conventional subscriber line interface circuit, and Fig. 3 is the operating waveform of Fig. 2. 4 is an operating waveform diagram of FIG. 1, FIG. 5 is a circuit diagram of a subscriber line interface circuit showing a second embodiment of the present invention, and FIG. 6 is an operating waveform diagram of FIG. 5. be. 31... Telephone, 32, 33... Communication line, 4
0,40A...integrated part, 41,42...first
, second output power transistors, 43, 44...
...first and second drive circuits, 45, 47...capacity,
46...Control circuit.

Claims

[Claims for Utility Model Registration] First and second output power transistors constituting a pair of mutually complementary balanced output circuits;
A subscriber line interface circuit comprising first and second drive circuits for driving a second output power transistor, and a control circuit that controls the first and second drive circuits, wherein at least the first Alternatively, a capacitor for transient response delay is connected between the base and collector of one of the second output power transistors, and the capacitor and the first
A subscriber line interface circuit characterized in that a second output power transistor, first and second drive circuits, and a control circuit are constructed using a monolithic integrated circuit.