JPS57124925A - Voltage controlled oscillator - Google Patents
Voltage controlled oscillatorInfo
- Publication number
- JPS57124925A JPS57124925A JP1095781A JP1095781A JPS57124925A JP S57124925 A JPS57124925 A JP S57124925A JP 1095781 A JP1095781 A JP 1095781A JP 1095781 A JP1095781 A JP 1095781A JP S57124925 A JPS57124925 A JP S57124925A
- Authority
- JP
- Japan
- Prior art keywords
- trs
- pair
- controlled oscillator
- voltage controlled
- common
- 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
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
- H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
- H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
- H03K3/282—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable
- H03K3/2821—Emitters connected to one another by using a capacitor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
PURPOSE:To obtain an oscillation frequency stable to the change in ambient temperature, by common connection of a pair of transistors (TRs) to a pair of TRs functioning as a major part of a voltage controlled oscillator, and connecting a common emitter to a constant current source. CONSTITUTION:A pair of TRs 37, 38 are connected to the base of a pair of TRs 33, 34 constituting a voltage controlled oscillator in common, and the collector is connected to the emitter of TRs 31, 32 and the base of the TRs 34, 33, respectively. The TRs 37, 38 are in common emitter connection and connected to a constant current source consisting of a TR47 and a resistor 49, and the base of the TR47 is connected to a division circuit consisting of resistors 36, 45 and a diode 46 connected to a power supply terminal. The temperature characteristic of the oscillation frequency (f) of the circuit is determined with the temperature characteristics of forward voltages VD26, VD56 of diodes 26, 56, and since the ratio is not changed despite temperature change, the oscillation frequency (f) is not fluctuated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1095781A JPS57124925A (en) | 1981-01-27 | 1981-01-27 | Voltage controlled oscillator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1095781A JPS57124925A (en) | 1981-01-27 | 1981-01-27 | Voltage controlled oscillator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57124925A true JPS57124925A (en) | 1982-08-04 |
Family
ID=11764658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1095781A Pending JPS57124925A (en) | 1981-01-27 | 1981-01-27 | Voltage controlled oscillator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57124925A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52140256A (en) * | 1976-05-18 | 1977-11-22 | Matsushita Electric Ind Co Ltd | Multi-vibrator |
-
1981
- 1981-01-27 JP JP1095781A patent/JPS57124925A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52140256A (en) * | 1976-05-18 | 1977-11-22 | Matsushita Electric Ind Co Ltd | Multi-vibrator |
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