JPH01153733U - - Google Patents
Info
- Publication number
- JPH01153733U JPH01153733U JP4975588U JP4975588U JPH01153733U JP H01153733 U JPH01153733 U JP H01153733U JP 4975588 U JP4975588 U JP 4975588U JP 4975588 U JP4975588 U JP 4975588U JP H01153733 U JPH01153733 U JP H01153733U
- Authority
- JP
- Japan
- Prior art keywords
- variable capacitance
- capacitance element
- inductance
- antenna
- control voltage
- 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 1
- 238000010586 diagram Methods 0.000 description 4
Description
第１図はこの考案の一実施例の構成を示す回路
図、第２図は同実施例の等価回路図、第３図は従
来のアンテナ同調回路の構成例を示す回路図、第
４図は同アンテナ同調回路の等価回路図である。
１……アンテナ端子、５……ライン板（１次イ
ンダクタンス）、６……ライン板（２次インダク
タンス）、７……第１の可変容量ダイオード、１
６……第２の可変容量ダイオード、Ｖｔ……選局
制御電圧。
FIG. 1 is a circuit diagram showing the configuration of an embodiment of this invention, FIG. 2 is an equivalent circuit diagram of the same embodiment, FIG. 3 is a circuit diagram showing an example of the configuration of a conventional antenna tuning circuit, and FIG. FIG. 3 is an equivalent circuit diagram of the antenna tuning circuit. 1... Antenna terminal, 5... Line plate (primary inductance), 6... Line plate (secondary inductance), 7... First variable capacitance diode, 1
6...Second variable capacitance diode, Vt...Tuning control voltage.
Claims (1)
ンダクタンスと、前記アンテナ端子と前記１次イ
ンダクタンスとの間に介挿されたＴ形ハイパスフ
イルタと、前記１次インダクタンスに誘導結合さ
れた２次インダクタンスと、前記２次インダクタ
ンスに並列接続された第１の可変容量素子とから
なる電子同調チユーナにおけるアンテナ同調回路
において、前記ハイパスフイルタを構成する容量
を第２の可変容量素子を用いて構成し、前記第２
の可変容量素子へ前記第１の可変容量素子に印加
する制御電圧と同一の制御電圧を印加するように
したことを特徴とする電子同調チユーナにおける
アンテナ同調回路。 a primary inductance that receives a signal input to an antenna terminal; a T-shaped high-pass filter inserted between the antenna terminal and the primary inductance; and a secondary inductance that is inductively coupled to the primary inductance; In an antenna tuning circuit in an electronic tuning tuner comprising a first variable capacitance element connected in parallel to the secondary inductance, the capacitor constituting the high pass filter is configured using a second variable capacitance element, and the second
An antenna tuning circuit in an electronic tuning tuner, characterized in that the same control voltage as the control voltage applied to the first variable capacitance element is applied to the variable capacitance element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4975588U JPH0546349Y2 (en) | 1988-04-13 | 1988-04-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4975588U JPH0546349Y2 (en) | 1988-04-13 | 1988-04-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01153733U true JPH01153733U (en) | 1989-10-23 |
| JPH0546349Y2 JPH0546349Y2 (en) | 1993-12-03 |
Family
ID=31275838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4975588U Expired - Lifetime JPH0546349Y2 (en) | 1988-04-13 | 1988-04-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0546349Y2 (en) |
-
1988
- 1988-04-13 JP JP4975588U patent/JPH0546349Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0546349Y2 (en) | 1993-12-03 |
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