JPS5679961A - Frequency-to-voltage converting circuit - Google Patents
Frequency-to-voltage converting circuitInfo
- Publication number
- JPS5679961A JPS5679961A JP15709679A JP15709679A JPS5679961A JP S5679961 A JPS5679961 A JP S5679961A JP 15709679 A JP15709679 A JP 15709679A JP 15709679 A JP15709679 A JP 15709679A JP S5679961 A JPS5679961 A JP S5679961A
- Authority
- JP
- Japan
- Prior art keywords
- resistance
- frequency
- capacity value
- goes
- change
- 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.)
- Granted
Links
Landscapes
- Control Of Velocity Or Acceleration (AREA)
Abstract
PURPOSE: To make frequency-to-voltage conversion characteristics nearly of the same value in a wide range of input signal frequencies, by changing over a limiting frequency range without changing the degree of frequency-to-voltage conversion.
CONSTITUTION: A series circuit of a capacitor 53 and the collector-emitter of a switching transistor 54 is connected in parallel to a capactior 21, and a change-over signal SW from a terminal 55 is supplied via a resistance 56 to the base of this TR54. When the change-over signal SW is "0", the TRs 54 and 56 go off and an FET63 goes on, and the capacity value is only the capacity value of the capactor 21. The gain of an amplifier 57 of this time is the value determined by a resistance 61, a resistance 62 connected parallel with a resistance 58, and an operational amplifier 59. When the change-over signal SW goes "1", the TRs 54 and 64 go on and the FET63 goes off, and the capacity value is the combined capacity value of the capacitors 21, 53; moreover, the gain of the amplifier 57 is lowered.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15709679A JPS5679961A (en) | 1979-12-04 | 1979-12-04 | Frequency-to-voltage converting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15709679A JPS5679961A (en) | 1979-12-04 | 1979-12-04 | Frequency-to-voltage converting circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5679961A true JPS5679961A (en) | 1981-06-30 |
JPS6325363B2 JPS6325363B2 (en) | 1988-05-25 |
Family
ID=15642152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15709679A Granted JPS5679961A (en) | 1979-12-04 | 1979-12-04 | Frequency-to-voltage converting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5679961A (en) |
-
1979
- 1979-12-04 JP JP15709679A patent/JPS5679961A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6325363B2 (en) | 1988-05-25 |
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