JPS54149452A - Signal level adjustment unit - Google Patents

Signal level adjustment unit

Info

Publication number
JPS54149452A
JPS54149452A JP5804178A JP5804178A JPS54149452A JP S54149452 A JPS54149452 A JP S54149452A JP 5804178 A JP5804178 A JP 5804178A JP 5804178 A JP5804178 A JP 5804178A JP S54149452 A JPS54149452 A JP S54149452A
Authority
JP
Japan
Prior art keywords
digital counter
signal level
attenuator group
resistance attenuator
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
JP5804178A
Other languages
Japanese (ja)
Inventor
Masao Tomita
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP5804178A priority Critical patent/JPS54149452A/en
Publication of JPS54149452A publication Critical patent/JPS54149452A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/001—Digital control of analog signals

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To adjust the signal level of a signal transmission line digitally by arranging a resistance attenuator group on the signal transmission line and displaying the digital counter count output on a display device. CONSTITUTION:Resistance attenuator group 3 formed by plural resistance attenuators, which are set to an attenuation quantity according to the binary output of digital counter 4, is arranged between input terminal 1, where analogue signals are applied, and output terminal 2, where level-controlled analogue signals are obtained, and is connected to operation switch 6 performing the adjustment of the signal level. Pulse generator circuit 5 to generate counting pulses is connected to digital counter which outputs binary information according to count and gives it to resistance attenuator group 3 and driving circuit 7, and digital counter 4 is connected to not only resistance attenuator group 3 but also display device 8 through driving circuit 7 which converts the binary output to signals which can be displayed.
JP5804178A 1978-05-15 1978-05-15 Signal level adjustment unit Pending JPS54149452A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5804178A JPS54149452A (en) 1978-05-15 1978-05-15 Signal level adjustment unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5804178A JPS54149452A (en) 1978-05-15 1978-05-15 Signal level adjustment unit

Publications (1)

Publication Number Publication Date
JPS54149452A true JPS54149452A (en) 1979-11-22

Family

ID=13072842

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5804178A Pending JPS54149452A (en) 1978-05-15 1978-05-15 Signal level adjustment unit

Country Status (1)

Country Link
JP (1) JPS54149452A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143652U (en) * 1981-03-04 1982-09-09
US4396806A (en) * 1980-10-20 1983-08-02 Anderson Jared A Hearing aid amplifier
JPS59177217U (en) * 1983-05-13 1984-11-27 パイオニア株式会社 Automatic recording level adjustment device
JPH05275946A (en) * 1992-03-30 1993-10-22 Mitsubishi Electric Corp Gain control amplifier

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51128248A (en) * 1975-04-21 1976-11-09 Western Electric Co Signal level control circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51128248A (en) * 1975-04-21 1976-11-09 Western Electric Co Signal level control circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396806A (en) * 1980-10-20 1983-08-02 Anderson Jared A Hearing aid amplifier
JPS57143652U (en) * 1981-03-04 1982-09-09
JPH035073Y2 (en) * 1981-03-04 1991-02-08
JPS59177217U (en) * 1983-05-13 1984-11-27 パイオニア株式会社 Automatic recording level adjustment device
JPH05275946A (en) * 1992-03-30 1993-10-22 Mitsubishi Electric Corp Gain control amplifier

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