JPS5755606A - Digital control attenuator - Google Patents

Digital control attenuator

Info

Publication number
JPS5755606A
JPS5755606A JP13092580A JP13092580A JPS5755606A JP S5755606 A JPS5755606 A JP S5755606A JP 13092580 A JP13092580 A JP 13092580A JP 13092580 A JP13092580 A JP 13092580A JP S5755606 A JPS5755606 A JP S5755606A
Authority
JP
Japan
Prior art keywords
attenuation
switches
digital control
sws4
swp4
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
JP13092580A
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 JP13092580A priority Critical patent/JPS5755606A/en
Publication of JPS5755606A publication Critical patent/JPS5755606A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/24—Frequency- independent attenuators

Landscapes

  • Attenuators (AREA)

Abstract

PURPOSE:To obtain a degree of attenuation proportional to the exponential function of the value of a digital control signal by constituting a ladder-type resistance circuit which covers the 1st-bit attenuation stage - (n)th-bit attenuation stage and by turning on and off them through switches. CONSTITUTION:Input terminals 4-1-4-4 for a four-bit binary digital control signal have weights 2<0>, 2<1>, 2<2>, and 2<3>. Switches SWP1-SWP4 are switched by buffer amplifiers 5-1-5-4 performing opening and closure drive, and output signals of those buffer amplifiers 5-1-5-4 are inverted by inverters 6-1-6-4 to open and close corresponding switches SWS1-SWS4. Then, when the switches SWS1-SWS4 are off and the SWP1-SWP4 are also off, and when the switches SWS1-SWS4 are off and the SWP1-SWP4 are on, degrees of attenuation at respective attenuation stages are K, K<2>, K<4>, and K<8> (K=RP/(RP+RO) and RP=RP1-RP48).
JP13092580A 1980-09-19 1980-09-19 Digital control attenuator Pending JPS5755606A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13092580A JPS5755606A (en) 1980-09-19 1980-09-19 Digital control attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13092580A JPS5755606A (en) 1980-09-19 1980-09-19 Digital control attenuator

Publications (1)

Publication Number Publication Date
JPS5755606A true JPS5755606A (en) 1982-04-02

Family

ID=15045930

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13092580A Pending JPS5755606A (en) 1980-09-19 1980-09-19 Digital control attenuator

Country Status (1)

Country Link
JP (1) JPS5755606A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5938654U (en) * 1982-09-03 1984-03-12 古河電気工業株式会社 solar heat collection circuit
JPS61251327A (en) * 1985-04-30 1986-11-08 Fujitsu Ltd Digital-analog converter
US4990868A (en) * 1988-12-10 1991-02-05 Rockwell International Corporation Modified progressive impedance ladder network
WO2009058948A2 (en) * 2007-10-30 2009-05-07 Qualcomm Incorporated Programmable gain circuit
WO2023228227A1 (en) * 2022-05-23 2023-11-30 三菱電機株式会社 Variable attenuator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5938654U (en) * 1982-09-03 1984-03-12 古河電気工業株式会社 solar heat collection circuit
JPS61251327A (en) * 1985-04-30 1986-11-08 Fujitsu Ltd Digital-analog converter
US4990868A (en) * 1988-12-10 1991-02-05 Rockwell International Corporation Modified progressive impedance ladder network
WO2009058948A2 (en) * 2007-10-30 2009-05-07 Qualcomm Incorporated Programmable gain circuit
WO2009058948A3 (en) * 2007-10-30 2009-11-19 Qualcomm Incorporated Programmable gain circuit
US7868681B2 (en) 2007-10-30 2011-01-11 Qualcomm, Incorporated Programmable gain circuit
WO2023228227A1 (en) * 2022-05-23 2023-11-30 三菱電機株式会社 Variable attenuator

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