JPH01132134U - - Google Patents

Info

Publication number
JPH01132134U
JPH01132134U JP2598388U JP2598388U JPH01132134U JP H01132134 U JPH01132134 U JP H01132134U JP 2598388 U JP2598388 U JP 2598388U JP 2598388 U JP2598388 U JP 2598388U JP H01132134 U JPH01132134 U JP H01132134U
Authority
JP
Japan
Prior art keywords
changeover switch
switch section
modulated signal
switching operation
modulator
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
Application number
JP2598388U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP2598388U priority Critical patent/JPH01132134U/ja
Publication of JPH01132134U publication Critical patent/JPH01132134U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Transmitters (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例を示す電気回路概略
図であり、第２図は波形を示し、第３図は従来例
を示す回路概略図である。 １：第１ローパスフイルター、２：第２ローパ
スフイルター、５：映像増幅器、６：テレビ用音
声増幅器、７：Ｆ３用音声増幅器、ＳＷ１：第１
切換スイツチ部、ＳＷ２：第２切換スイツチ部、
ＳＷ３：第３切換スイツチ部、１５：論理回路、
１６：ロツクデイテクター、１７：ＦＭテレビ・
Ｆ３無線装置切換えスイツチＳＷ、１８：ＰＴＴ
スイツチ、３Ｃ：方形波。 FIG. 1 is a schematic diagram of an electric circuit showing an embodiment of the present invention, FIG. 2 is a schematic diagram of a waveform, and FIG. 3 is a schematic circuit diagram of a conventional example. 1: First low-pass filter, 2: Second low-pass filter, 5: Video amplifier, 6: Audio amplifier for TV, 7: Audio amplifier for F3, SW1: First
Changeover switch section, SW2: second changeover switch section,
SW3: third changeover switch section, 15: logic circuit,
16: Lock day detector, 17: FM TV
F3 wireless device changeover switch SW, 18: PTT
Switch, 3C: Square wave.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 位相制御回路ＰＬＬの電圧制御型発振器ＶＣＯ
に変調器を取付け、該変調器に第１切換スイツチ
部を介して異なる周波数帯域の信号を入力するよ
うにし、位相制御回路ＰＬＬの位相比較器と電圧
制御発振器ＶＣＯとの間には、第２切換スイツチ
部を有しこの切換え動作で折換えられる時定数の
異なるローパスフイルターを接続し、被変調信号
周波数を決める前記第１切換スイツチ部の切換え
動作とともに該被変調信号周波数に対応するロー
パスフイルターの時定数を前記第２切換スイツチ
部の切換え動作で設定し、被変調信号周波数に対
応する最適速度で前記位相制御回路ＰＬＬが動作
することを特徴とする異なる周波数帯域の信号に
対するＦＭ変調装置。 Voltage controlled oscillator VCO of phase control circuit PLL
A modulator is attached to the modulator, and signals of different frequency bands are input to the modulator via the first changeover switch section, and a second Low-pass filters each having a changeover switch section and having different time constants that are switched by the switching operation are connected, and together with the switching operation of the first changeover switch section that determines the frequency of the modulated signal, the low-pass filter corresponding to the frequency of the modulated signal is connected. An FM modulation device for signals in different frequency bands, characterized in that a time constant is set by a switching operation of the second changeover switch section, and the phase control circuit PLL operates at an optimum speed corresponding to the modulated signal frequency.
JP2598388U 1988-03-01 1988-03-01 Pending JPH01132134U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2598388U JPH01132134U (en) 1988-03-01 1988-03-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2598388U JPH01132134U (en) 1988-03-01 1988-03-01

Publications (1)

Publication Number Publication Date
JPH01132134U true JPH01132134U (en) 1989-09-07

Family

ID=31247192

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2598388U Pending JPH01132134U (en) 1988-03-01 1988-03-01

Country Status (1)

Country Link
JP (1) JPH01132134U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03236634A (en) * 1990-02-13 1991-10-22 Alps Electric Co Ltd Fm modulation transmitter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5342543A (en) * 1976-09-30 1978-04-18 Oki Electric Ind Co Ltd Angular modulating system
JPH0157833B2 (en) * 1980-12-29 1989-12-07 Seiko Epson Corp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5342543A (en) * 1976-09-30 1978-04-18 Oki Electric Ind Co Ltd Angular modulating system
JPH0157833B2 (en) * 1980-12-29 1989-12-07 Seiko Epson Corp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03236634A (en) * 1990-02-13 1991-10-22 Alps Electric Co Ltd Fm modulation transmitter

Similar Documents

Publication Publication Date Title
CA2049346A1 (en) Fast-switching frequency synthesizer
JPH01132134U (en)
JPS5929812U (en) FM modulation circuit
JPH01132133U (en)
JPH0178468U (en)
JP2719467B2 (en) Audio signal modulation circuit
JPH0141250Y2 (en)
JPS61156310U (en)
JPH01171114U (en)
JPH0339962Y2 (en)
JPS6342601Y2 (en)
JPH0157833U (en)
JPH0356215U (en)
JPH0480119U (en)
JPH05266584A (en) Fm modulating/demodulating circuit
JPH0178467U (en)
JPH0416667U (en)
JPS61113439U (en)
JPH0236215U (en)
JPS6447132U (en)
JPS62121843U (en)
JPS6147539U (en) PLL tuning circuit
JPH0328481U (en)
JPS5848507A (en) Modulator
JPS6381430U (en)