JPH0165519U - - Google Patents
Info
- Publication number
- JPH0165519U JPH0165519U JP1987160118U JP16011887U JPH0165519U JP H0165519 U JPH0165519 U JP H0165519U JP 1987160118 U JP1987160118 U JP 1987160118U JP 16011887 U JP16011887 U JP 16011887U JP H0165519 U JPH0165519 U JP H0165519U
- Authority
- JP
- Japan
- Prior art keywords
- capacitance diode
- variable
- variable capacitance
- temperature
- tuning
- 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
- 230000001419 dependent effect Effects 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims 1
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Description
図示した回路は、本考案のドリフト防止回路の
一実施例である。
主な図番の説明、３……局部発振回路、６……
可変容量ダイオード、１４……選局用電源回路、
１６……分圧回路、１７……摺動子、１８……可
変抵抗器、２０……温度依存型抵抗素子。
The illustrated circuit is one embodiment of the drift prevention circuit of the present invention. Explanation of main figure numbers, 3...Local oscillation circuit, 6...
Variable capacitance diode, 14...Tuition selection power supply circuit,
16 ... Voltage dividing circuit, 17... Slider, 18... Variable resistor, 20... Temperature dependent resistance element.
Claims (1)
、選局操作による摺動子の変位により抵抗値が変
化せしめられると共に前記選局用電源回路より得
られる直流電圧を分圧する分圧回路を形成する可
変抵抗器と、該可変抵抗器の摺動子より得られる
電圧によつて容量が制御されると共に局部発振回
路の発振周波数を変化せしめる可変容量ダイオー
ドと、前記可変抵抗器に直列又は該可変抵抗器の
摺動子と可変容量ダイオードとの間に接続されて
いると共に温度により抵抗値が変化する温度依存
型抵抗素子とより成り、前記温度依存型抵抗素子
の抵抗変化による可変容量ダイオードへの印加電
圧の変化により該可変容量ダイオードの温度によ
る容量変化を補正するようにしたことを特徴とす
る受信機のドリフト防止回路。 A tuning power supply circuit that outputs a DC voltage for tuning, and a voltage dividing circuit whose resistance value is changed by displacement of a slider due to a tuning operation, and which divides the DC voltage obtained from the tuning power supply circuit. a variable resistor that forms a variable resistor, a variable capacitance diode whose capacitance is controlled by the voltage obtained from the slider of the variable resistor, and which changes the oscillation frequency of the local oscillation circuit; The variable capacitance diode comprises a temperature-dependent resistance element connected between the slider of the variable resistor and the variable capacitance diode, and whose resistance value changes depending on temperature, and the variable capacitance diode changes in resistance of the temperature-dependent resistance element. 1. A drift prevention circuit for a receiver, wherein a change in capacitance due to temperature of the variable capacitance diode is corrected by a change in voltage applied to the variable capacitance diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987160118U JPH0165519U (en) | 1987-10-20 | 1987-10-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987160118U JPH0165519U (en) | 1987-10-20 | 1987-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0165519U true JPH0165519U (en) | 1989-04-26 |
Family
ID=31441903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987160118U Pending JPH0165519U (en) | 1987-10-20 | 1987-10-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0165519U (en) |
-
1987
- 1987-10-20 JP JP1987160118U patent/JPH0165519U/ja active Pending