JPS54149447A - Signal volume controller - Google Patents

Signal volume controller

Info

Publication number
JPS54149447A
JPS54149447A JP5804278A JP5804278A JPS54149447A JP S54149447 A JPS54149447 A JP S54149447A JP 5804278 A JP5804278 A JP 5804278A JP 5804278 A JP5804278 A JP 5804278A JP S54149447 A JPS54149447 A JP S54149447A
Authority
JP
Japan
Prior art keywords
resistance
group
constitution
attenuator
continuous
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
JP5804278A
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 JP5804278A priority Critical patent/JPS54149447A/en
Publication of JPS54149447A publication Critical patent/JPS54149447A/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 without distortion of the input signal

Abstract

PURPOSE:To perform easily and accurately the control of a signal transmission volume and a gain digitally by arranging a resistance attenuator group, which has an attenuation quantity corresponding to the count output of a digital counter, on the signal transmission line. CONSTITUTION:Operation switch 8 can be switched to a one-step mode and a continuous mode, and the first pulse generator 6 or the second pulse generator 7 generates a single pulse or a continuous pulse train according to the operation of the one-step mode or the continuous mode, and generated pulses are inputted to digital counter 4 through OR gate circuit 5. Then, a binary output according to count is given to resistance attenuator group 3. Resistance attunuator group 3 consists of plural resistance attenuators including analogue switches and the attenuation quantity of each attenuator is set according to the binary output of counter 4. By this constitution, a desired-level analogue signal can be obtained easily at output terminal 2.
JP5804278A 1978-05-15 1978-05-15 Signal volume controller Pending JPS54149447A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5804278A JPS54149447A (en) 1978-05-15 1978-05-15 Signal volume controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5804278A JPS54149447A (en) 1978-05-15 1978-05-15 Signal volume controller

Publications (1)

Publication Number Publication Date
JPS54149447A true JPS54149447A (en) 1979-11-22

Family

ID=13072871

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5804278A Pending JPS54149447A (en) 1978-05-15 1978-05-15 Signal volume controller

Country Status (1)

Country Link
JP (1) JPS54149447A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57178725U (en) * 1981-05-07 1982-11-12
JPS60153044U (en) * 1984-03-21 1985-10-12 沖電気工業株式会社 attenuation circuit
JPS6295328U (en) * 1985-12-04 1987-06-18
JP2017103656A (en) * 2015-12-03 2017-06-08 ラピスセミコンダクタ株式会社 Gain control circuit and gain control method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57178725U (en) * 1981-05-07 1982-11-12
JPS60153044U (en) * 1984-03-21 1985-10-12 沖電気工業株式会社 attenuation circuit
JPS6295328U (en) * 1985-12-04 1987-06-18
JP2017103656A (en) * 2015-12-03 2017-06-08 ラピスセミコンダクタ株式会社 Gain control circuit and gain control method

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