JPS564909A - Variable attenuating circuit and constant voltage amplitude output circuit making use of it - Google Patents

Variable attenuating circuit and constant voltage amplitude output circuit making use of it

Info

Publication number
JPS564909A
JPS564909A JP8022379A JP8022379A JPS564909A JP S564909 A JPS564909 A JP S564909A JP 8022379 A JP8022379 A JP 8022379A JP 8022379 A JP8022379 A JP 8022379A JP S564909 A JPS564909 A JP S564909A
Authority
JP
Japan
Prior art keywords
collector
constant voltage
making use
voltage amplitude
resistance
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
JP8022379A
Other languages
Japanese (ja)
Inventor
Takanosuke Aoyanagi
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.)
B II II KK
Original Assignee
B II II KK
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 B II II KK filed Critical B II II KK
Priority to JP8022379A priority Critical patent/JPS564909A/en
Publication of JPS564909A publication Critical patent/JPS564909A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/24—Frequency-independent attenuators

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To make it possible to obtain a great attenuation factor by constituting a split in which the collector dynamic internal resistance of a transistor is connected to a fixed resistance in series. CONSTITUTION:When a resistance supplying a DC current to the collector of transistor 6 is not connected another circuit, any DC current flows through the collector at all, but the collector is held at a DC positive voltage of about 10mV. Once an AC voltage is applied to the collector, the AC current flows by current dynamic collector internal resistance. Therefore, the ratio of output 5 to an input to terminal 1 can be obtained as the split ratio of fixed resistance 2 to the dynamic collector internal resistance of transistor 6. Consequently, an AC waveform variable attenuator can be obtained which has a broad-range attenuation factor.
JP8022379A 1979-06-27 1979-06-27 Variable attenuating circuit and constant voltage amplitude output circuit making use of it Pending JPS564909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8022379A JPS564909A (en) 1979-06-27 1979-06-27 Variable attenuating circuit and constant voltage amplitude output circuit making use of it

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8022379A JPS564909A (en) 1979-06-27 1979-06-27 Variable attenuating circuit and constant voltage amplitude output circuit making use of it

Publications (1)

Publication Number Publication Date
JPS564909A true JPS564909A (en) 1981-01-19

Family

ID=13712358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8022379A Pending JPS564909A (en) 1979-06-27 1979-06-27 Variable attenuating circuit and constant voltage amplitude output circuit making use of it

Country Status (1)

Country Link
JP (1) JPS564909A (en)

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