JPH0457931U - - Google Patents
Info
- Publication number
- JPH0457931U JPH0457931U JP9981690U JP9981690U JPH0457931U JP H0457931 U JPH0457931 U JP H0457931U JP 9981690 U JP9981690 U JP 9981690U JP 9981690 U JP9981690 U JP 9981690U JP H0457931 U JPH0457931 U JP H0457931U
- Authority
- JP
- Japan
- Prior art keywords
- pin diode
- series
- same direction
- connection line
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Noise Elimination (AREA)
- Circuits Of Receivers In General (AREA)
Description
第１図及び第２図はこの考案に係るチユーナの
ＡＧＣ回路の実施例を示し、第１図は回路図、第
２図はこの考案の他の実施例の回路図である。
主な符号の説明、１……アンテナ、２，４……
カツプリングコンデンサ、３，６……高周波同調
回路、５……高周波増幅回路、７……ミキサ回路
、８……ＡＧＣ制御回路、１１〜１４……ＰＩＮ
ダイオード。
1 and 2 show an embodiment of an AGC circuit for a tuner according to this invention, FIG. 1 is a circuit diagram, and FIG. 2 is a circuit diagram of another embodiment of this invention. Explanation of main symbols, 1... antenna, 2, 4...
Coupling capacitor, 3, 6...High frequency tuning circuit, 5...High frequency amplification circuit, 7...Mixer circuit, 8...AGC control circuit, 11-14...PIN
diode.
Claims (1)
高周波信号の強さを検出すると共に、ＡＧＣ電圧
を発生せしめるＡＧＣ回路と、アノードに前記Ａ
ＧＣ電圧が印加される第１のピンダイオードと、
第１のピンダイオードと同じ向きに直列に接続さ
れる第２のピンダイオードと、前記第２のピンダ
イオードと同じ向きに直列に接続される第３のピ
ンダイオードと、前記第３のピンダイオードと同
じ向きに直列に接続される第４のピンダイオード
と、前記第１のピンダイオードと第２のピンダイ
オードとの接続線路と前記高周波同調回路の入力
側との間に設けたコンデンサと、前記第３のピン
ダイオードと第４のピンダイオードとの接続線路
と前記高周波同調回路の出力側との間に設けたコ
ンデンサと、前記第２のピンダイオードと第３の
ピンダイオードとの接続線路とグランドとの間に
設けた抵抗器及びコンデンサとで構成したことを
特徴とするチユーナのＡＧＣ回路。 a high-frequency tuning circuit that amplifies a high-frequency signal; an AGC circuit that detects the strength of the high-frequency signal and generates an AGC voltage;
a first pin diode to which a GC voltage is applied;
a second pin diode connected in series in the same direction as the first pin diode, a third pin diode connected in series in the same direction as the second pin diode, and the third pin diode; a fourth pin diode connected in series in the same direction; a capacitor provided between the connection line between the first pin diode and the second pin diode and the input side of the high frequency tuning circuit; A capacitor provided between a connection line between the third pin diode and the fourth pin diode and the output side of the high frequency tuning circuit, a connection line between the second pin diode and the third pin diode, and a ground. A tuner AGC circuit comprising a resistor and a capacitor provided between the tuner and the capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9981690U JP2519320Y2 (en) | 1990-09-26 | 1990-09-26 | Tuner AGC circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9981690U JP2519320Y2 (en) | 1990-09-26 | 1990-09-26 | Tuner AGC circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0457931U true JPH0457931U (en) | 1992-05-19 |
| JP2519320Y2 JP2519320Y2 (en) | 1996-12-04 |
Family
ID=31842014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9981690U Expired - Lifetime JP2519320Y2 (en) | 1990-09-26 | 1990-09-26 | Tuner AGC circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2519320Y2 (en) |
-
1990
- 1990-09-26 JP JP9981690U patent/JP2519320Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2519320Y2 (en) | 1996-12-04 |
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