JPS6121120U - preamplifier - Google Patents

preamplifier

Info

Publication number
JPS6121120U
JPS6121120U JP10553784U JP10553784U JPS6121120U JP S6121120 U JPS6121120 U JP S6121120U JP 10553784 U JP10553784 U JP 10553784U JP 10553784 U JP10553784 U JP 10553784U JP S6121120 U JPS6121120 U JP S6121120U
Authority
JP
Japan
Prior art keywords
gain
variable means
preamplifier
feedback
changing
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.)
Pending
Application number
JP10553784U
Other languages
Japanese (ja)
Inventor
紘一 平野
Original Assignee
山水電気株式会社
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 山水電気株式会社 filed Critical 山水電気株式会社
Priority to JP10553784U priority Critical patent/JPS6121120U/en
Publication of JPS6121120U publication Critical patent/JPS6121120U/en
Pending legal-status Critical Current

Links

Landscapes

  • Amplifiers (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来のプリアンプ、第２図は本考案のブリアン
プ、第３図は利得可変手段の実施例である。 ２・・・・・・増幅部、３・・・・・・イコライザ素子
、Ｒ，Ｒ２・・・・・・カートリッジの負荷抵抗、Ｒ３
，Ｒ４・・・・・・帰還用抵抗、Ｒ５９ Ｒ６・・・・
・・利得可変用抵抗。FIG. 1 shows a conventional preamplifier, FIG. 2 shows a preamplifier according to the present invention, and FIG. 3 shows an embodiment of the variable gain means. 2...Amplification section, 3...Equalizer element, R, R2...Cartridge load resistance, R3
, R4... Feedback resistor, R59 R6...
...Resistance for variable gain.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 負帰還が施されその利得が帰還率によって定められるプ
リアンプにおいて、利得を変えるための帰還率可変手段
と、裸利得を変えるための裸利得可変手段とを具備し、
前記帰還率可変手段と前記裸利得可変手段とを連動．さ
せることにより帰還量． を常に一定とすることを特徴
とするプリアンプ。A preamplifier to which negative feedback is applied and whose gain is determined by a feedback rate, comprising a feedback rate variable means for changing the gain and a bare gain variable means for changing the bare gain,
The feedback rate variable means and the naked gain variable means are linked. The amount of feedback is increased by A preamplifier that is characterized by keeping the constant constant.
JP10553784U 1984-07-12 1984-07-12 preamplifier Pending JPS6121120U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10553784U JPS6121120U (en) 1984-07-12 1984-07-12 preamplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10553784U JPS6121120U (en) 1984-07-12 1984-07-12 preamplifier

Publications (1)

Publication Number Publication Date
JPS6121120U true JPS6121120U (en) 1986-02-07

Family

ID=30664854

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10553784U Pending JPS6121120U (en) 1984-07-12 1984-07-12 preamplifier

Country Status (1)

Country Link
JP (1) JPS6121120U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7940122B2 (en) 2007-09-07 2011-05-10 Fujitsu Limited Amplifier circuit and communication device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7940122B2 (en) 2007-09-07 2011-05-10 Fujitsu Limited Amplifier circuit and communication device

Similar Documents

Publication Publication Date Title
JPS6121120U (en) preamplifier
JPS60174316U (en) Balanced amplifier
JPS60152159U (en) Doctor blade assembly for developing device
JPS6017591U (en) Variable far-infrared surface heating element
JPS60114425U (en) Sound quality adjustment circuit
JPS6111908U (en) filter medium
JPS5839798U (en) memory card
JPS6142119U (en) Control amplifier midpoint bias circuit
JPS59171303U (en) small resistor
JPS5862257U (en) Humidity sensor circuit
JPS59115327U (en) Sticker type thermometer
JPS58179971U (en) Graphite jig for brazing
JPS6127201U (en) membrane resistor
JPS5869383U (en) cassette tape case
JPS59189334U (en) comparator
JPS60137403U (en) Resistor
JPS59138213U (en) Tubular solenoid coil
JPS5849248U (en) Covered electrode
JPH02137113U (en)
JPS583002U (en) Resistor
JPS5968666U (en) soldering iron
JPS6061835U (en) electronic components
JPS60184312U (en) operational amplifier circuit
JPS5840802U (en) Electrical parts such as variable resistors
JPS60121459U (en) soldering iron