JPH0239908B2 - - Google Patents

Info

Publication number
JPH0239908B2
JPH0239908B2 JP18259683A JP18259683A JPH0239908B2 JP H0239908 B2 JPH0239908 B2 JP H0239908B2 JP 18259683 A JP18259683 A JP 18259683A JP 18259683 A JP18259683 A JP 18259683A JP H0239908 B2 JPH0239908 B2 JP H0239908B2
Authority
JP
Japan
Prior art keywords
transistor
preamplifier
amplifier
circuit
terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP18259683A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6074858A (ja
Inventor
Michio Hara
Kaneyuki Nishihara
Tatsuhiro Osanawa
Yutaka Nishino
Makoto Yoshitoshi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP18259683A priority Critical patent/JPS6074858A/ja
Publication of JPS6074858A publication Critical patent/JPS6074858A/ja
Publication of JPH0239908B2 publication Critical patent/JPH0239908B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6008—Substation equipment, e.g. for use by subscribers including speech amplifiers in the transmitter circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
JP18259683A 1983-09-30 1983-09-30 電話機の送話増幅器回路 Granted JPS6074858A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18259683A JPS6074858A (ja) 1983-09-30 1983-09-30 電話機の送話増幅器回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18259683A JPS6074858A (ja) 1983-09-30 1983-09-30 電話機の送話増幅器回路

Publications (2)

Publication Number Publication Date
JPS6074858A JPS6074858A (ja) 1985-04-27
JPH0239908B2 true JPH0239908B2 (enExample) 1990-09-07

Family

ID=16121047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18259683A Granted JPS6074858A (ja) 1983-09-30 1983-09-30 電話機の送話増幅器回路

Country Status (1)

Country Link
JP (1) JPS6074858A (enExample)

Also Published As

Publication number Publication date
JPS6074858A (ja) 1985-04-27

Similar Documents

Publication Publication Date Title
JPS61230411A (ja) 電気回路
JPS5990412A (ja) 双方向性定電流駆動回路
JPS6354006A (ja) 電流ミラ−回路
JPS6260847B2 (enExample)
JPH07225628A (ja) 基準電圧発生回路
JPH0770935B2 (ja) 差動電流増幅回路
JPH0682308B2 (ja) 電流源回路配置
US4251778A (en) Circuit with electrically controlled gain
US4378529A (en) Differential amplifier input stage capable of operating in excess of power supply voltage
JPH0239908B2 (enExample)
JPH0362042B2 (enExample)
JPH04127703A (ja) 演算増幅回路
US3999140A (en) Bias current circuit
JP2504075B2 (ja) トランジスタ増幅器
JPH0145766B2 (enExample)
JPS6333726B2 (enExample)
JPS6130448B2 (enExample)
JPH0239881B2 (enExample)
JP2532900Y2 (ja) リミッタ回路
JP2702271B2 (ja) 電源回路
JPS6259926B2 (enExample)
JPH062337Y2 (ja) Ａｌｃ回路
JP2848330B2 (ja) カレントミラー回路
JPS5819859Y2 (ja) 差動増幅回路
JPS6221310A (ja) 電流定倍回路