JPS5564405A - Receiver circuit with temperature compensating function - Google Patents
Receiver circuit with temperature compensating functionInfo
- Publication number
- JPS5564405A JPS5564405A JP13770078A JP13770078A JPS5564405A JP S5564405 A JPS5564405 A JP S5564405A JP 13770078 A JP13770078 A JP 13770078A JP 13770078 A JP13770078 A JP 13770078A JP S5564405 A JPS5564405 A JP S5564405A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- transistor
- resistance
- thermistor
- compensating function
- 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
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
PURPOSE: To prevent tuning-out by automatically compensating a local oscillation frequency by making a temperature sensing element detect a temperature where the cancellation of a temperature coefficient is disabled.
CONSTITUTION: To the base of transistor in mixing and local-oscillation circuit 13 with a temperature compensating function, a bias circuit composed of resistance R1 and thermistor 7 is connected. Transistor 8 is cut off nearly at the normal temperature. As a result, a voltage applied to a varactor diode is equal to Vcc. At a temperature where temperature coefficients of the oscillation circuit, coil and capacitor can not be canceled, the resistance value of thermistor 7 falls and transistor 8 starts conducting. As a result, the voltage applied to varactor diode 9 drops and electrostatic capacity increases, thereby correcting the oscillation frequency. At this time, the increase rate of the electrostatic capacity is variable with resistance R2.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13770078A JPS5564405A (en) | 1978-11-08 | 1978-11-08 | Receiver circuit with temperature compensating function |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13770078A JPS5564405A (en) | 1978-11-08 | 1978-11-08 | Receiver circuit with temperature compensating function |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5564405A true JPS5564405A (en) | 1980-05-15 |
Family
ID=15204763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13770078A Pending JPS5564405A (en) | 1978-11-08 | 1978-11-08 | Receiver circuit with temperature compensating function |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5564405A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4599581A (en) * | 1983-06-01 | 1986-07-08 | U.S. Philips Corporation | Temperature stabilizing microwave oscillator circuit |
US6278313B1 (en) | 1997-11-27 | 2001-08-21 | Nec Corporation | Semiconductor circuit in which distortion caused by changes in ambient temperature is compensated |
-
1978
- 1978-11-08 JP JP13770078A patent/JPS5564405A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4599581A (en) * | 1983-06-01 | 1986-07-08 | U.S. Philips Corporation | Temperature stabilizing microwave oscillator circuit |
US6278313B1 (en) | 1997-11-27 | 2001-08-21 | Nec Corporation | Semiconductor circuit in which distortion caused by changes in ambient temperature is compensated |
US6437634B1 (en) | 1997-11-27 | 2002-08-20 | Nec Corporation | Semiconductor circuit in which distortion caused by change in ambient temperature is compensated |
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