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 itInfo
- 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
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
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.
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) |
-
1979
- 1979-06-27 JP JP8022379A patent/JPS564909A/en active Pending
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