JPH0398574U - - Google Patents
Info
- Publication number
- JPH0398574U JPH0398574U JP677490U JP677490U JPH0398574U JP H0398574 U JPH0398574 U JP H0398574U JP 677490 U JP677490 U JP 677490U JP 677490 U JP677490 U JP 677490U JP H0398574 U JPH0398574 U JP H0398574U
- Authority
- JP
- Japan
- Prior art keywords
- output
- audio intermediate
- tuning
- intermediate frequency
- circuit
- 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
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Television Receiver Circuits (AREA)
- Color Television Systems (AREA)
- Superheterodyne Receivers (AREA)
- Circuits Of Receivers In General (AREA)
Description
図は本考案の一実施例を示す音声中間周波数変
換回路図である。
１……音声中間周波検波回路、２……同調回路
、３……整流回路、４……同調コンデンサ内蔵ス
イツチ素子、５……周波数変換器、６……周波数
変換器の局部発振回路の同調コンデンサ、７……
周波数変換器入力端子、１０……周波数変換した
音声中間周波の出力端子である。
The figure is a diagram of an audio intermediate frequency conversion circuit showing an embodiment of the present invention. 1... Audio intermediate frequency detection circuit, 2... Tuning circuit, 3... Rectifier circuit, 4... Switch element with built-in tuning capacitor, 5... Frequency converter, 6... Tuning capacitor of local oscillation circuit of frequency converter. ,7...
Frequency converter input terminal, 10... Output terminal of frequency-converted audio intermediate frequency.
Claims (1)
機において、同受信機の音声中間周波検波出力を
周波数変換器と音声中間周波数に同調した同調回
路とに接続し、同同調回路出力を同調電圧に応じ
て出力する整流回路に接続し、複数の同調用のコ
ンデンサを並列に接続すべくスイツチ素子を同整
流回路出力により選択的に動作せしめ、同スイツ
チにより前記周波数変換器の局部発振回路の同調
コンデンサに前記同調用のコンデンサを並列に接
続し、異なる複数種の音声中間周波を所定周波数
の音声中間周波に変換して出力することを特徴と
した音声中間周波数変換回路。 In a television broadcast receiver that supports multiple intermediate frequencies, the audio intermediate frequency detection output of the receiver is connected to a frequency converter and a tuning circuit tuned to the audio intermediate frequency, and the output of the tuning circuit is adjusted according to the tuning voltage. A switch element is connected to the output rectifier circuit, and a switch element is selectively operated by the output of the rectifier circuit in order to connect a plurality of tuning capacitors in parallel. An audio intermediate frequency conversion circuit characterized in that tuning capacitors are connected in parallel to convert a plurality of different audio intermediate frequencies into an audio intermediate frequency of a predetermined frequency and output the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP677490U JPH0398574U (en) | 1990-01-26 | 1990-01-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP677490U JPH0398574U (en) | 1990-01-26 | 1990-01-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0398574U true JPH0398574U (en) | 1991-10-14 |
Family
ID=31510446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP677490U Pending JPH0398574U (en) | 1990-01-26 | 1990-01-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0398574U (en) |
-
1990
- 1990-01-26 JP JP677490U patent/JPH0398574U/ja active Pending