JP2008141716A5 - - Google Patents

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Publication number
JP2008141716A5
JP2008141716A5 JP2007037555A JP2007037555A JP2008141716A5 JP 2008141716 A5 JP2008141716 A5 JP 2008141716A5 JP 2007037555 A JP2007037555 A JP 2007037555A JP 2007037555 A JP2007037555 A JP 2007037555A JP 2008141716 A5 JP2008141716 A5 JP 2008141716A5
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JP
Japan
Prior art keywords
input
filter
frequency amplifier
electronic tuner
current control
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Pending
Application number
JP2007037555A
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Japanese (ja)
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JP2008141716A (en
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Publication date
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Priority to JP2007037555A priority Critical patent/JP2008141716A/en
Priority claimed from JP2007037555A external-priority patent/JP2008141716A/en
Priority to US11/935,425 priority patent/US20080113686A1/en
Priority to EP07120376A priority patent/EP1921755A2/en
Publication of JP2008141716A publication Critical patent/JP2008141716A/en
Publication of JP2008141716A5 publication Critical patent/JP2008141716A5/ja
Pending legal-status Critical Current

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Claims (13)

携帯装置に内蔵される電子チューナにおいて、前記電子チューナは、高周波信号が入力される入力端子と、この入力端子に入力された信号が供給されるとともに前記携帯装置の送受信回路からの送信信号を阻止する第１のフィルタと、この第１のフィルタからの出力が一方の入力に供給される混合器と、この混合器の他方の入力に接続された発振器と、前記混合器の出力が供給される出力端子とを備え、前記入力端子と前記第１のフィルタとの間に挿入されるとともに電流値を制御する電流制御用入力を有する第１の高周波増幅器と、この第１の高周波増幅器の出力と前記電流制御用入力との間に挿入されるとともに前記送信信号を検出して前記第１の高周波増幅器の電流を制御する電流制御部を設け、前記携帯電話が前記送信信号を送信中は前記第１の高周波増幅器の電流を大きく設定する電子チューナ。 In the electronic tuner built in the mobile ObiSo location, the electronic tuner, transmission and reception of the mobile ObiSo location with input to a terminal a high-frequency signal are entered, the signal inputted to the input terminal of this is supplied A first filter for blocking a transmission signal from the circuit; a mixer to which an output from the first filter is supplied to one input; an oscillator connected to the other input of the mixer; and a output terminal that outputs the vessel is Ru is supplied, a first high-frequency amplifier having a current control input for controlling the current value with is inserted between the entering-output terminal and the first filter, A current control unit that is inserted between the output of the first high-frequency amplifier and the current control input and that detects the transmission signal and controls the current of the first high-frequency amplifier; Transmitting the transmission signal It said first high-frequency amplifier current greatly electronic tuner for setting. 電流制御部は、段階的に立ち上がる送信信号の中の最初に立ち上がる信号を検出して第１の高周波増幅器の電流を制御する請求項１に記載の電子チューナ。 2. The electronic tuner according to claim 1, wherein the current control unit detects a signal that rises first among transmission signals that rise in a stepwise manner, and controls the current of the first high-frequency amplifier. 携帯装置は、ＧＳＭ方式の携帯電話装置であって、この携帯電話装置に用いられる電子チューナにおいて、電流制御部は、送受信回路から送信されるバースト信号の存在する時間には第１の高周波増幅器の電流を大きく設定し、前記バースト信号の存在しない時間には前記第１の高周波増幅器の電流を小さく設定する請求項１に記載の電子チューナ。 The mobile device is a GSM mobile phone device, and in the electronic tuner used in the mobile phone device , the current control unit is connected to the first high-frequency amplifier during the time when the burst signal transmitted from the transmission / reception circuit exists. 2. The electronic tuner according to claim 1, wherein the current is set large and the current of the first high-frequency amplifier is set small during a time when the burst signal does not exist. 第１のフィルタは、送信信号を抑圧するノッチフィルタで構成される請求項１に記載の電子チューナ。 The electronic tuner according to claim 1, wherein the first filter includes a notch filter that suppresses a transmission signal. 入力端子と第１の高周波増幅器の入力との間に送信信号を抑圧する第２のフィルタを挿入し、この第２のフィルタの前記送信信号に対する抑圧量は、第１のフィルタの前記送信信号に対する抑圧量より小さく設定される請求項１に記載の電子チューナ。 Insert the second filter for suppressing a transmission signal between the input of the input terminal and the first high-frequency amplifier, suppression amount with respect to the transmission signal of the second filter, the transmission signal of the first filter The electronic tuner according to claim 1, wherein the electronic tuner is set to be smaller than a suppression amount with respect to. 電流制御部は、送信信号を通過させる第３のフィルタと、この第３のフィルタからの送信信号を検出する検出回路と、この検出回路の出力と第１の高周波増幅器の電流制御用入力との間に接続されるとともに前記第１の高周波増幅器の電流を制御する電流制御回路とからなる請求項１に記載の電子チューナ。 The current control unit includes a third filter that transmits the transmission signal, a detection circuit that detects the transmission signal from the third filter, an output of the detection circuit, and a current control input of the first high-frequency amplifier. The electronic tuner according to claim 1, further comprising a current control circuit that is connected in between and controls a current of the first high-frequency amplifier. 第３のフィルタと検出回路との間に第２の高周波増幅器を挿入し、前記検出回路から第１のフィルタの入力へのアイソレーションを大きくした請求項６に記載の電子チューナ。 The electronic tuner according to claim 6, wherein a second high-frequency amplifier is inserted between the third filter and the detection circuit to increase isolation from the detection circuit to the input of the first filter. 第３のフィルタは、入力から出力に向かって順に、第１のコンデンサとインダクタが直列に接続された請求項７に記載の電子チューナ。 The electronic tuner according to claim 7, wherein the third filter includes a first capacitor and an inductor connected in series in order from the input to the output. 検出回路は、第３のフィルタの出力とグランド間に接続された検波器と、インダクタと第１のコンデンサの接続点と電流制御回路の入力との間に接続された抵抗と、前記電流制御回路の入力とグランド間に接続された第２のコンデンサとからなり、前記検波器からの検波電圧が前記抵抗を介して電流制御回路の入力に供給される請求項８に記載の電子チューナ。 The detection circuit includes a detector connected between the output of the third filter and the ground, a resistor connected between a connection point of the inductor and the first capacitor, and an input of the current control circuit, and the current control circuit 9. The electronic tuner according to claim 8, further comprising: a second capacitor connected between the first input and the ground, wherein the detection voltage from the detector is supplied to the input of the current control circuit via the resistor. 第１の高周波増幅器の出力と第１のフィルタの入力との間に挿入されるとともに前記第１の高周波増幅器の出力信号の一部が出力される出力端子を有する抽出回路を設け、前記抽出回路の前記出力端子が電流制御部の入力に接続される請求項１に記載の電子チューナ。 An extraction circuit which is inserted between the output of the first high-frequency amplifier and the input of the first filter and has an output terminal for outputting a part of the output signal of the first high-frequency amplifier; The electronic tuner according to claim 1, wherein the output terminal is connected to an input of a current control unit. 第１の高周波増幅器の出力と第１のフィルタの入力との間に挿入されるとともに前記第１の高周波増幅器の出力信号を分配した信号が出力される出力端子を有する電力分配器を設け、前記電力分配器の前記出力端子が電流制御部の入力に接続される請求項１に記載の電子チューナ。 A power distributor having an output terminal inserted between an output of the first high frequency amplifier and an input of the first filter and outputting a signal obtained by distributing the output signal of the first high frequency amplifier; The electronic tuner according to claim 1, wherein the output terminal of the power distributor is connected to an input of a current control unit. 第１の高周波増幅器の出力と第１のフィルタの入力との間に挿入されるとともに前記第１の高周波増幅器の出力信号の一部が出力される出力端子を有するアイソレータを設け、前記アイソレータの前記出力端子が電流制御部の入力に接続される請求項１に記載の電子チューナ。 An isolator having an output terminal inserted between an output of the first high-frequency amplifier and an input of the first filter and outputting a part of an output signal of the first high-frequency amplifier is provided; The electronic tuner according to claim 1, wherein the output terminal is connected to an input of the current control unit. 請求項１に記載の電子チューナを用いた携帯電話装置。 A cellular phone device using the electronic tuner according to claim 1.
JP2007037555A 2006-11-10 2007-02-19 Electronic tuner and portable telephone device using the same Pending JP2008141716A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2007037555A JP2008141716A (en) 2006-11-10 2007-02-19 Electronic tuner and portable telephone device using the same
US11/935,425 US20080113686A1 (en) 2006-11-10 2007-11-06 Electronic tuner and portable telephone device using the same
EP07120376A EP1921755A2 (en) 2006-11-10 2007-11-09 Electronic tuner and portable telephone device using the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006304739 2006-11-10
JP2007037555A JP2008141716A (en) 2006-11-10 2007-02-19 Electronic tuner and portable telephone device using the same

Publications (2)

Publication Number Publication Date
JP2008141716A JP2008141716A (en) 2008-06-19
JP2008141716A5 true JP2008141716A5 (en) 2011-03-24

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Family Applications (1)

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JP2007037555A Pending JP2008141716A (en) 2006-11-10 2007-02-19 Electronic tuner and portable telephone device using the same

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JP (1) JP2008141716A (en)
CN (1) CN100536545C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6329732B2 (en) * 2013-05-13 2018-05-23 Ｄｘアンテナ株式会社 Level checker and reception setting method of digital terrestrial television broadcasting using level checker
WO2022196642A1 (en) * 2021-03-16 2022-09-22 株式会社村田製作所 Transient voltage absorbing circuit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4329713A (en) * 1980-06-26 1982-05-11 Rca Corporation Television automatic gain control system
JPH0715391A (en) * 1993-06-24 1995-01-17 Sharp Corp Radio communications equipment
JP2001292037A (en) * 2000-04-04 2001-10-19 Matsushita Electric Ind Co Ltd Distortion characteristic control system
JP4639809B2 (en) * 2005-01-17 2011-02-23 パナソニック株式会社 Electronic tuner and portable device using the same
JP2006237793A (en) * 2005-02-23 2006-09-07 Matsushita Electric Ind Co Ltd High-frequency signal receiver and high-frequency signal receiver using the same
JP2006261998A (en) * 2005-03-16 2006-09-28 Toshiba Corp Mobile communication terminal

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