JPS5678225A - Variable attenuating circuit - Google Patents
Variable attenuating circuitInfo
- Publication number
- JPS5678225A JPS5678225A JP15483679A JP15483679A JPS5678225A JP S5678225 A JPS5678225 A JP S5678225A JP 15483679 A JP15483679 A JP 15483679A JP 15483679 A JP15483679 A JP 15483679A JP S5678225 A JPS5678225 A JP S5678225A
- Authority
- JP
- Japan
- Prior art keywords
- terminals
- terminal
- analog signal
- switches
- resistor
- 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
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
- Attenuators (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
PURPOSE:To adapt a variable attenating circuit to LSI implementation by enabling the control of a computer by supplying an analog signal input to resistors, connected to switches respectively, via an input buffer amplifying circuit. CONSTITUTION:An analog signal voltage applied to signal input terminal 1 is passed through input buffer amplifier 4 and led to terminals (a) of N switches 701...70N and one terminal of resistor 61. Then, terminals (b) of switches 701- 70N are grounded and terminals (c) are also connected to one-side terminals of resistor groups 601-60N provided as many as the power of ''2''. The other-side terminals of N+1-number resistances of resistor groups 601-60N and 61 are all connected in common to the input terminal of output buffer amplifier 5 and the analog signal output of amplifier 5 is outputted from terminal 3. Consequently, since each switch can be controlled externally, the attenuation can be set under the control of a computer and a relative resistance value is required, so that this will be suitable to LSI implementation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15483679A JPS5678225A (en) | 1979-11-29 | 1979-11-29 | Variable attenuating circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15483679A JPS5678225A (en) | 1979-11-29 | 1979-11-29 | Variable attenuating circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5678225A true JPS5678225A (en) | 1981-06-27 |
Family
ID=15592935
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15483679A Pending JPS5678225A (en) | 1979-11-29 | 1979-11-29 | Variable attenuating circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5678225A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60206209A (en) * | 1984-03-29 | 1985-10-17 | Teac Co | Sound volume controller |
-
1979
- 1979-11-29 JP JP15483679A patent/JPS5678225A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60206209A (en) * | 1984-03-29 | 1985-10-17 | Teac Co | Sound volume controller |
JPH0352684B2 (en) * | 1984-03-29 | 1991-08-12 | Teac Corp |
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