JP2006067120A5 - - Google Patents

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JP2006067120A5
JP2006067120A5 JP2004245698A JP2004245698A JP2006067120A5 JP 2006067120 A5 JP2006067120 A5 JP 2006067120A5 JP 2004245698 A JP2004245698 A JP 2004245698A JP 2004245698 A JP2004245698 A JP 2004245698A JP 2006067120 A5 JP2006067120 A5 JP 2006067120A5
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pair
comb
amplifier
electrodes
signal
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JP2004245698A
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JP2006067120A (en
JP4415258B2 (en
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Claims (4)

電波として送信された信号を受信するアンテナと、発振信号を出力する局部発振器と、前記アンテナによって受信された信号と前記発振信号とを混合して中間周波数の信号に変換する混合器と、前記中間周波数の信号を低周波信号に復調する検波器とを備えた受信機であって、
前記局部発振器は、圧電基板上に配置した一対の反射器と、前記一対の反射器の間に並列して設けられる櫛歯状電極から成る一対のＩＤＴとを有するＳＡＷ共振子と、
前記ＳＡＷ共振子に配設された一対のＩＤＴに並列接続する増幅器とを備え、
前記一対のＩＤＴのいずれか一方のＩＤＴを構成する一対の前記櫛歯状電極のそれぞれと、前記増幅器との間に設けた一対の切替回路と、
入力した周波数選択信号に基づいて前記切替回路を同期して切り替え、前記一対の櫛歯状電極の一方を前記増幅器の入力側または出力側に接続し、前記一対の櫛歯状電極の他方を前記増幅器の出力側または入力側に接続する制御部と、
を有することを特徴とする受信機。 An antenna that receives a signal transmitted as a radio wave ; a local oscillator that outputs an oscillation signal ; a mixer that mixes the signal received by the antenna and the oscillation signal to convert the signal to an intermediate frequency signal; A receiver comprising a detector for demodulating a frequency signal into a low frequency signal,
The local oscillator includes a SAW resonator having a pair of reflectors disposed on a piezoelectric substrate, and a pair of IDTs composed of comb-like electrodes provided in parallel between the pair of reflectors;
Comprising an amplifier connected in parallel to a pair of IDT disposed on the SAW resonator,
A pair of switching circuits provided between each of the pair of comb-like electrodes constituting the IDT of one of the pair of IDTs and the amplifier;
The switching circuit is switched synchronously based on the input frequency selection signal, one of the pair of comb electrodes is connected to the input side or the output side of the amplifier, and the other of the pair of comb electrodes is connected to the input side. A control unit connected to the output side or input side of the amplifier;
A receiver comprising: 前記混合器と前記検波器との間に、第２の混合器と、当該第２の混合器に接続された第２の局部発振器が備えられたことを特徴とする請求項１に記載の受信機。   The reception according to claim 1, wherein a second mixer and a second local oscillator connected to the second mixer are provided between the mixer and the detector. Machine. 前記第２の局部発振器は、圧電基板上に配置した一対の反射器と、前記一対の反射器の間に並列して設けられる櫛歯状電極から成る一対のＩＤＴとを有するＳＡＷ共振子と、
前記ＳＡＷ共振子に配設された一対のＩＤＴに並列接続する増幅器とから成り、
前記一対のＩＤＴのいずれか一方のＩＤＴを構成する一対の前記櫛歯状電極のそれぞれと、前記増幅器との間に設けた一対の切替回路と、
入力した周波数選択信号に基づいて前記切替回路を同期して切り替え、前記一対の櫛歯状電極の一方を前記増幅器の入力側または出力側に接続し、前記一対の櫛歯状電極の他方を前記増幅器の出力側または入力側に接続する制御部と、
を有することを特徴とする請求項２に記載の受信機。 The second local oscillator includes a SAW resonator having a pair of reflectors disposed on a piezoelectric substrate, and a pair of IDTs composed of comb-like electrodes provided in parallel between the pair of reflectors;
An amplifier connected in parallel to a pair of IDTs disposed in the SAW resonator;
A pair of switching circuits provided between each of the pair of comb-like electrodes constituting the IDT of one of the pair of IDTs and the amplifier;
The switching circuit is switched synchronously based on the input frequency selection signal, one of the pair of comb electrodes is connected to the input side or the output side of the amplifier, and the other of the pair of comb electrodes is connected to the input side. A control unit connected to the output side or input side of the amplifier;
The receiver according to claim 2, comprising: 前記ＳＡＷ共振子に配設される前記一対のＩＤＴは、櫛歯状電極の交差幅を同一に構成することを特徴とする請求項１乃至請求項３のいずれかに記載の受信機。 The receiver according to any one of claims 1 to 3, wherein the pair of IDTs arranged in the SAW resonator have the same cross width of comb-like electrodes.
JP2004245698A 2004-08-25 2004-08-25 Receiving machine Expired - Fee Related JP4415258B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004245698A JP4415258B2 (en) 2004-08-25 2004-08-25 Receiving machine

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Application Number Priority Date Filing Date Title
JP2004245698A JP4415258B2 (en) 2004-08-25 2004-08-25 Receiving machine

Publications (3)

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JP2006067120A JP2006067120A (en) 2006-03-09
JP2006067120A5 true JP2006067120A5 (en) 2007-10-04
JP4415258B2 JP4415258B2 (en) 2010-02-17

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JP2004245698A Expired - Fee Related JP4415258B2 (en) 2004-08-25 2004-08-25 Receiving machine

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7786827B2 (en) 2006-11-29 2010-08-31 Epson Toyocom Corporation Surface acoustic wave device, transmitter, and transceiver
JP5136594B2 (en) * 2010-05-21 2013-02-06 株式会社デンソー Surface acoustic wave oscillator
US8294528B2 (en) * 2010-12-28 2012-10-23 Qualcomm Incorporated Wideband multi-mode VCO

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