JPS5549009A - Sub-sonic filter of amplifier - Google Patents

Sub-sonic filter of amplifier

Info

Publication number
JPS5549009A
JPS5549009A JP12195978A JP12195978A JPS5549009A JP S5549009 A JPS5549009 A JP S5549009A JP 12195978 A JP12195978 A JP 12195978A JP 12195978 A JP12195978 A JP 12195978A JP S5549009 A JPS5549009 A JP S5549009A
Authority
JP
Japan
Prior art keywords
frequency
cut
sub
filter
potentiometer
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.)
Granted
Application number
JP12195978A
Other languages
Japanese (ja)
Other versions
JPS6244442B2 (en
Inventor
Haruo Hiraoka
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP12195978A priority Critical patent/JPS5549009A/en
Publication of JPS5549009A publication Critical patent/JPS5549009A/en
Publication of JPS6244442B2 publication Critical patent/JPS6244442B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/02—Manually-operated control

Landscapes

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

Abstract

PURPOSE:To make it possible to improve a howling margin at a low price, by increasing the cut-off frequency of a sub-sonic filter as a bass range is reinforced. CONSTITUTION:In a SEPP amplifier circuit, a high-frequency control part (resistances R1 and R2, capacitors C1 and C2, and potentiometer VR1), a low-frequency control part (R3-R6, capacitors C4 and C5, and potentiometer VR2), and subsonic filter SF (VR2, R4 and capacitor CS) are inserted between output terminal OUT and the base of transistor Q2 forming a feedback signal input terminal, and with switch S ON or OFF, SF is inserted or removed. Operating VR2 in the above- mentioned way reinforces a bass range and in accordance with it, the cut-off frequency of SF is increased so as to cut sufficiently an ultralow frequency component except a musical component, so that its howling margin can be increased.
JP12195978A 1978-10-05 1978-10-05 Sub-sonic filter of amplifier Granted JPS5549009A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12195978A JPS5549009A (en) 1978-10-05 1978-10-05 Sub-sonic filter of amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12195978A JPS5549009A (en) 1978-10-05 1978-10-05 Sub-sonic filter of amplifier

Publications (2)

Publication Number Publication Date
JPS5549009A true JPS5549009A (en) 1980-04-08
JPS6244442B2 JPS6244442B2 (en) 1987-09-21

Family

ID=14824129

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12195978A Granted JPS5549009A (en) 1978-10-05 1978-10-05 Sub-sonic filter of amplifier

Country Status (1)

Country Link
JP (1) JPS5549009A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57195218U (en) * 1981-06-02 1982-12-10

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5184355U (en) * 1974-12-26 1976-07-06
JPS51120647U (en) * 1975-03-27 1976-09-30

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5184355U (en) * 1974-12-26 1976-07-06
JPS51120647U (en) * 1975-03-27 1976-09-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57195218U (en) * 1981-06-02 1982-12-10

Also Published As

Publication number Publication date
JPS6244442B2 (en) 1987-09-21

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