JPS5765014A - Digital control attenuator - Google Patents

Digital control attenuator

Info

Publication number
JPS5765014A
JPS5765014A JP55140983A JP14098380A JPS5765014A JP S5765014 A JPS5765014 A JP S5765014A JP 55140983 A JP55140983 A JP 55140983A JP 14098380 A JP14098380 A JP 14098380A JP S5765014 A JPS5765014 A JP S5765014A
Authority
JP
Japan
Prior art keywords
signal
digital control
switch
turned
input
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
JP55140983A
Other languages
Japanese (ja)
Inventor
Masaru Uya
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 JP55140983A priority Critical patent/JPS5765014A/en
Publication of JPS5765014A publication Critical patent/JPS5765014A/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

  • Attenuators (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To control an analog signal in equal digital step with a simple constitution, by supplying an input signal to the input of the 1st stage through cascade connection of a plurality of signal attenuators, controlling it with a digital control signal and obtaining an output signal from the final stage. CONSTITUTION:Input ternimals 4-1-4-4 of a digital control signal in 4-bit binary have weight of 2<0>, 2<1>, 2<2>, 23. Buffer amplifiers 5-1-5-4 are provided corresponding to each bit of the digital control signal to drive corresponding switches SWP1- SWP4. Inverters 6-1-6-4 drive switches SWS1-SWS4 which invert the outputs of each amplifier, and when the voltage at terminals 4-N (where: N=1-4) is ''0'', the switch SWSN is turned on and the switch SWPN is turned off, and when the voltage is ''1'', the switch SWSN is turned off and the switch SWSN turns on. Thus, the amplitude of analog input signal can be outputted into equal digital step control with a simple constitution.
JP55140983A 1980-10-07 1980-10-07 Digital control attenuator Pending JPS5765014A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55140983A JPS5765014A (en) 1980-10-07 1980-10-07 Digital control attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55140983A JPS5765014A (en) 1980-10-07 1980-10-07 Digital control attenuator

Publications (1)

Publication Number Publication Date
JPS5765014A true JPS5765014A (en) 1982-04-20

Family

ID=15281394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55140983A Pending JPS5765014A (en) 1980-10-07 1980-10-07 Digital control attenuator

Country Status (1)

Country Link
JP (1) JPS5765014A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739252A (en) * 1986-04-24 1988-04-19 International Business Machines Corporation Current attenuator useful in a very low leakage current measuring device
US8710899B2 (en) 2008-09-17 2014-04-29 Lockheed Martin Corporation Stepped delay control of integrated switches
JP2016036180A (en) * 2015-11-13 2016-03-17 ルネサスエレクトロニクス株式会社 Wireless communication device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4945612A (en) * 1972-09-04 1974-05-01

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4945612A (en) * 1972-09-04 1974-05-01

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739252A (en) * 1986-04-24 1988-04-19 International Business Machines Corporation Current attenuator useful in a very low leakage current measuring device
US8710899B2 (en) 2008-09-17 2014-04-29 Lockheed Martin Corporation Stepped delay control of integrated switches
JP2016036180A (en) * 2015-11-13 2016-03-17 ルネサスエレクトロニクス株式会社 Wireless communication device

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