JPS6489708A - Low boosting circuit - Google Patents

Low boosting circuit

Info

Publication number
JPS6489708A
JPS6489708A JP62246234A JP24623487A JPS6489708A JP S6489708 A JPS6489708 A JP S6489708A JP 62246234 A JP62246234 A JP 62246234A JP 24623487 A JP24623487 A JP 24623487A JP S6489708 A JPS6489708 A JP S6489708A
Authority
JP
Japan
Prior art keywords
resistance
lpf
input
power amplifier
output
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
JP62246234A
Other languages
Japanese (ja)
Inventor
Hisao Hayashi
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.)
Toshiba Corp
Tsugaru Toshiba Sound Equipment Co Ltd
Original Assignee
Toshiba Corp
Tsugaru Toshiba Sound Equipment 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 Toshiba Corp, Tsugaru Toshiba Sound Equipment Co Ltd filed Critical Toshiba Corp
Priority to JP62246234A priority Critical patent/JPS6489708A/en
Publication of JPS6489708A publication Critical patent/JPS6489708A/en
Pending legal-status Critical Current

Links

Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

PURPOSE:To obtain a sufficient low boosting effect even at the time of driving due to a low cost and a low voltage by composing of an LPF constituted to an in-phase amplifier having one gain or above while the output of a preamplifier is made into the input and a mixing resistance connected between the output of the LPF and a power amplifier input. CONSTITUTION:An LPF is composed of even an in-phase amplifier to determine an amplifier gain with resistances R4 and R5 and the output of the LPF is supplied through a resistance R6 of for mixing to the input of a power amplifier A2. The output of a preamplifier A1 is grounded through a resistance R7 and a volume VR and the variable output voltage obtained to the moving terminal of the volume VR is supplied to the input of the power amplifier A2. At the attenuating area of the LPF, the impedance due to the series of a capacitor C3 and the resistance R6 is connected to the input of the power amplifier A2 in parallel. At the passing area, a signal voltage attenuated by the resistance R6 and the resistance value of the volume VR is placed to the power amplifier A2, and thus, a low boosting circuit is realized. The low boosting quantity is changed by the position of the volume VR.
JP62246234A 1987-09-30 1987-09-30 Low boosting circuit Pending JPS6489708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62246234A JPS6489708A (en) 1987-09-30 1987-09-30 Low boosting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62246234A JPS6489708A (en) 1987-09-30 1987-09-30 Low boosting circuit

Publications (1)

Publication Number Publication Date
JPS6489708A true JPS6489708A (en) 1989-04-04

Family

ID=17145506

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62246234A Pending JPS6489708A (en) 1987-09-30 1987-09-30 Low boosting circuit

Country Status (1)

Country Link
JP (1) JPS6489708A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0369918U (en) * 1989-11-01 1991-07-12
CN108235184A (en) * 2018-01-17 2018-06-29 潍坊歌尔电子有限公司 A kind of bass bossting circuit and audio-frequence player device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0369918U (en) * 1989-11-01 1991-07-12
CN108235184A (en) * 2018-01-17 2018-06-29 潍坊歌尔电子有限公司 A kind of bass bossting circuit and audio-frequence player device
CN108235184B (en) * 2018-01-17 2020-08-28 潍坊歌尔电子有限公司 Bass enhancement circuit and audio playing equipment

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