JPS6410715A - Automatic loudness control circuit - Google Patents

Automatic loudness control circuit

Info

Publication number
JPS6410715A
JPS6410715A JP16471987A JP16471987A JPS6410715A JP S6410715 A JPS6410715 A JP S6410715A JP 16471987 A JP16471987 A JP 16471987A JP 16471987 A JP16471987 A JP 16471987A JP S6410715 A JPS6410715 A JP S6410715A
Authority
JP
Japan
Prior art keywords
output signal
amplifier
signal
components
power amplifier
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
JP16471987A
Other languages
Japanese (ja)
Other versions
JPH0671183B2 (en
Inventor
Masami Kato
Masaru Horikoshi
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP16471987A priority Critical patent/JPH0671183B2/en
Priority to US07/180,483 priority patent/US4982435A/en
Priority to EP88105872A priority patent/EP0287057B1/en
Priority to DE3850289T priority patent/DE3850289T2/en
Priority to CA000564288A priority patent/CA1305432C/en
Priority to KR88004342A priority patent/KR970004616B1/en
Publication of JPS6410715A publication Critical patent/JPS6410715A/en
Publication of JPH0671183B2 publication Critical patent/JPH0671183B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To reduce the number of components, and to reduce the dispersion of characteristic as well by providing a switch circuit which supplies one of the output signal of a signal line to let an input signal pass as it is or the output signal of an addition circuit to a power amplifier. CONSTITUTION:A buffer amplifier 11 forms the signal line to let the input signal pass as it is. When a manual switch 33 is turned OFF, the operation of buffer amplifier 11 is stopped, according to a control signal, generated from the switch circuit 32, and a summing amplifier 12, the buffer amplifier 24 and a detection circuit 30 turn into an operating state. The mixed output signal of an intermediate frequency band component, the level which is nearly equal to the output signal of a preamplifier 10, and a high and a low frequency band components, which were boosted, is obtained at the output terminal of the summing amplifier 12, and the mixed output signal is amplified by the power amplifier 25, and is impressed to a speaker 29, and in automatic loudness control corresponding to the output signal level of the power amplifier 25 is realized. Thus, the numbers of the externally attached components, the number of externally attached pins and the number of internal circuit elements can be reduced.
JP16471987A 1987-04-17 1987-07-01 Automatic loudness control circuit Expired - Lifetime JPH0671183B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP16471987A JPH0671183B2 (en) 1987-07-01 1987-07-01 Automatic loudness control circuit
US07/180,483 US4982435A (en) 1987-04-17 1988-04-12 Automatic loudness control circuit
EP88105872A EP0287057B1 (en) 1987-04-17 1988-04-13 Automatic loudness control circuit
DE3850289T DE3850289T2 (en) 1987-04-17 1988-04-13 Automatic volume control circuit.
CA000564288A CA1305432C (en) 1987-04-17 1988-04-15 Automatic loudness control circuit
KR88004342A KR970004616B1 (en) 1987-04-17 1988-04-16 Automatic loudness control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16471987A JPH0671183B2 (en) 1987-07-01 1987-07-01 Automatic loudness control circuit

Publications (2)

Publication Number Publication Date
JPS6410715A true JPS6410715A (en) 1989-01-13
JPH0671183B2 JPH0671183B2 (en) 1994-09-07

Family

ID=15798591

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16471987A Expired - Lifetime JPH0671183B2 (en) 1987-04-17 1987-07-01 Automatic loudness control circuit

Country Status (1)

Country Link
JP (1) JPH0671183B2 (en)

Also Published As

Publication number Publication date
JPH0671183B2 (en) 1994-09-07

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term