JP2006135829A - 可変インダクタ並びにそれを用いた発振器及び情報機器 - Google Patents
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- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1228—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more field effect transistors
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- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1206—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification
- H03B5/1212—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification the amplifier comprising a pair of transistors, wherein an output terminal of each being connected to an input terminal of the other, e.g. a cross coupled pair
- H03B5/1215—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification the amplifier comprising a pair of transistors, wherein an output terminal of each being connected to an input terminal of the other, e.g. a cross coupled pair the current source or degeneration circuit being in common to both transistors of the pair, e.g. a cross-coupled long-tailed pair
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- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1206—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification
- H03B5/1218—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification the generator being of the balanced type
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- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1231—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more bipolar transistors
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- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
- H03B5/124—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance
- H03B5/1243—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance the means comprising voltage variable capacitance diodes
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- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
- H03B5/124—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance
- H03B5/1246—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance the means comprising transistors used to provide a variable capacitance
- H03B5/1253—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance the means comprising transistors used to provide a variable capacitance the transistors being field-effect transistors
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- H—ELECTRICITY
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- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
- H03B5/1256—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a variable inductance
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
- H03B5/1293—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator having means for achieving a desired tuning characteristic, e.g. linearising the frequency characteristic across the tuning voltage range
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- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1296—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the feedback circuit comprising a transformer
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- H03H5/12—One-port networks comprising only passive electrical elements as network components with at least one voltage- or current-dependent element
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- H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
- H03B2201/02—Varying the frequency of the oscillations by electronic means
- H03B2201/0208—Varying the frequency of the oscillations by electronic means the means being an element with a variable capacitance, e.g. capacitance diode
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- H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
- H03B2201/02—Varying the frequency of the oscillations by electronic means
- H03B2201/0216—Varying the frequency of the oscillations by electronic means the means being an element with a variable inductance
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- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J2200/00—Indexing scheme relating to tuning resonant circuits and selecting resonant circuits
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Abstract
【解決手段】主インダクタL1に対して相互インダクタンスMを介して磁気的に結合している副インダクタL2に、素子値が可変のリアクタンス素子例えば可変容量かからなるインダクタンス制御回路41を接続する。可変容量の容量値を変化させるための制御信号を入力するインダクタンス制御端子VLCをインダクタンス制御回路に設ける。制御信号によって容量値を変化させることによって主インダクタのインダクタンスを変える。
【選択図】図3
Description
Claims (20)
- 第1のインダクタと、
上記第1のインダクタに対して相互インダクタンスを介して磁気的に結合している第2のインダクタと、
上記第2のインダクタに接続された、リアクタンス素子を含んで成るインダクタンス制御回路とを具備して成り、
上記インダクタンス制御回路は、上記リアクタンス素子の値を変化させるための制御信号を入力するインダクタンス制御端子を有し、
上記制御信号によって上記リアクタンス素子の値が変化することにより、上記第1のインダクタのインダクタンスが変化することを特徴とする可変インダクタ。 - 請求項1において、
上記リアクタンス素子は、上記制御信号によって容量値が変化する可変容量であることを特徴とする可変インダクタ。 - 請求項1において、
上記リアクタンス素子は、上記制御信号によって容量値が大小に変化する複数の並列接続された可変容量であることを特徴とする可変インダクタ。 - 請求項2において、
上記可変容量は、半導体のpn接合容量であり、上記制御信号が上記pn接合容量の両端に印加されることを特徴とする可変インダクタ。 - 請求項3において、
上記複数の可変容量の各々は、半導体のpn接合容量であり、上記複数の前記可変容量毎に独立して上記制御信号が上記pn接合容量の両端に印加されることを特徴とする可変インダクタ。 - 請求項2において、
上記可変容量は、MOSトランジスタによるMOS容量であり、上記制御信号が上記MOSトランジスタのゲートとソース・ドレインとの間に印加されることを特徴とする可変インダクタ。 - 請求項3において、
上記複数の可変容量の各々は、MOSトランジスタによるMOS容量であり、上記複数の可変容量毎に独立して上記制御信号が上記MOSトランジスタのゲートとソース・ドレインとの間に印加されることを特徴とする可変インダクタ。 - 請求項3記載において、
上記複数の可変容量の各々は、固定容量と上記固定容量に直列に接続されたスイッチとから構成され、
上記スイッチは、上記複数の可変容量毎に独立して与えられる上記制御信号によって開閉が制御され、
上記複数の可変容量の各々は、上記スイッチの開閉によって容量値が大小に変化することを特徴とする可変インダクタ。 - インダクタと容量とが並列に接続された共振回路と、
上記共振回路に接続された、負性コンダクタンスを発生する負性コンダクタンス発生回路とを具備し、上記共振回路の共振周波数でほぼ定まる周波数の信号を出力する発振器であって、
上記インダクタは、インダクタンスが変化する可変インダクタであり、
上記共振回路の共振周波数がインダクタンスの変化によって変化し、
上記可変インダクタは、
第1のインダクタと、
上記第1のインダクタに対して相互インダクタンスを介して磁気的に結合している第2のインダクタと、
上記第2のインダクタに接続された、リアクタンス素子を含んで成るインダクタンス制御回路とを具備して成り、
上記インダクタンス制御回路は、上記リアクタンス素子の値を変化させるための制御信号を入力するインダクタンス制御端子を有し、
上記制御信号によって上記リアクタンス素子の値が変化することにより、上記第1のインダクタのインダクタンスが変化することを特徴とする発振器。 - 請求項9において、
上記リアクタンス素子は、上記制御信号によって容量値が変化する可変容量であることを特徴とする発振器。 - 請求項9において、
上記リアクタンス素子は、上記制御信号によって容量値が大小に変化する複数の並列接続された可変容量であることを特徴とする発振器。 - 請求項9において、
上記容量は、容量値が変化する可変容量であり、
上記共振回路の共振周波数が容量値の変化によって変化することを特徴とする発振器。 - 請求項9において、
トランジスタの入力電極と接地電極の間に第1の容量が接続され、上記トランジスタの出力電極と上記接地電極の間に第2の容量が接続され、上記出力電極と上記接地電極の間に上記可変インダクタが接続され、
上記負性コンダクタンス発生回路が上記出力電極と上記接地電極の間に形成されていることを特徴とする発振器。 - 請求項13において、
上記発振器の2個が差動型を成すように相互に接続されていることを特徴とする発振器。 - 請求項12において、
上記負性コンダクタンス発生回路は、2個のトランジスタの一方のトランジスタの入力端子と他方のトランジスタの出力端子とが相互に結合され、上記一方のトランジスタと上記他方のトランジスタの接地端子が相互に接続され、上記接地端子の接続点に定電流源が接続されて成ることを特徴とする発振器。 - アンテナによって受信された受信信号を増幅する低雑音増幅器と、
上記低雑音増幅器の出力信号の周波数を変換するミキサと、
周波数変換のための局部発振信号を生成して上記ミキサに出力する発振器と、
上記ミキサの出力信号から受信のベースバンド信号を取り出す復調回路と、
送信するベースバンド信号を変調して互いに直交する2個の信号を出力する変調器と、
上記変調器が出力する直交する2個の信号を、上記発振器が出力する上記局部発振信号を用いて直交変調して直交変調信号を出力する直交変調器と、
上記直交変調信号を増幅する電力増幅器と、
受信時に上記アンテナからの上記受信信号を上記低雑音増幅器に供給し、送信時に上記電力増幅器が出力する上記直交変調信号を上記アンテナに供給するスイッチを具備して成り、
上記発振器は、
インダクタと容量とが並列に接続された共振回路と、
上記共振回路に接続された、負性コンダクタンスを発生する負性コンダクタンス発生回路とを具備し、上記共振回路の共振周波数でほぼ定まる周波数の信号を出力する発振器であって、
上記インダクタは、インダクタンスが変化する可変インダクタであり、
上記共振回路の共振周波数がインダクタンスの変化によって変化し、
上記可変インダクタは、
第1のインダクタと、
上記第1のインダクタに対して相互インダクタンスを介して磁気的に結合している第2のインダクタと、
上記第2のインダクタに接続された、リアクタンス素子を含んで成るインダクタンス制御回路とを具備して成り、
上記インダクタンス制御回路は、上記リアクタンス素子の値を変化させるための制御信号を入力するインダクタンス制御端子を有し、
上記制御信号によって上記リアクタンス素子の値が変化することにより、上記第1のインダクタのインダクタンスが変化することを特徴とする情報機器。 - 請求項16において、
上記リアクタンス素子は、上記制御信号によって容量値が変化する可変容量であることを特徴とする情報機器。 - 請求項16において、
上記リアクタンス素子は、上記制御信号によって容量値が大小に変化する複数の並列接続された可変容量であることを特徴とする情報機器。 - 請求項16において、
上記容量は、容量値が変化する可変容量であり、
上記共振回路の共振周波数が容量値の変化によって変化することを特徴とする情報機器。 - 請求項16において、
上記低雑音増幅器と、上記ミキサと、上記発振器と、上記復調回路と、上記変調器と、上記直交変調器とを含んで成る送受信回路が半導体素子として構成されていることを特徴とする情報機器。
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US11/268,643 US7902934B2 (en) | 2004-11-09 | 2005-11-08 | Variable inductor, and oscillator and communication system using the same |
US13/004,379 US8502614B2 (en) | 2004-11-09 | 2011-01-11 | Variable inductor, and oscillator and communication system using the same |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010074727A (ja) * | 2008-09-22 | 2010-04-02 | Nippon Dempa Kogyo Co Ltd | 低雑音電圧制御発振器 |
US7839229B2 (en) | 2007-01-19 | 2010-11-23 | Hitachi, Ltd. | Voltage-controlled oscillator and communication device using the same |
JP2011159953A (ja) * | 2010-01-05 | 2011-08-18 | Fujitsu Ltd | 電子回路及び電子機器 |
JP2015503296A (ja) * | 2011-12-19 | 2015-01-29 | インテル コーポレイション | シングルエンドのキャパシタンスが低減された電圧制御発振器 |
JP2015228702A (ja) * | 2015-09-03 | 2015-12-17 | インテル コーポレイション | シングルエンドのキャパシタンスが低減された電圧制御発振器 |
JP2016001884A (ja) * | 2007-09-21 | 2016-01-07 | クゥアルコム・インコーポレイテッドQualcomm Incorporated | 調整可能な周波数を備える信号発生器 |
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US20110105053A1 (en) | 2011-05-05 |
US20060097811A1 (en) | 2006-05-11 |
US8502614B2 (en) | 2013-08-06 |
US7902934B2 (en) | 2011-03-08 |
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