JP2008098731A - 電圧制御発振器 - Google Patents
電圧制御発振器 Download PDFInfo
- Publication number
- JP2008098731A JP2008098731A JP2006274971A JP2006274971A JP2008098731A JP 2008098731 A JP2008098731 A JP 2008098731A JP 2006274971 A JP2006274971 A JP 2006274971A JP 2006274971 A JP2006274971 A JP 2006274971A JP 2008098731 A JP2008098731 A JP 2008098731A
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- JP
- Japan
- Prior art keywords
- switching transistor
- parallel
- capacitor
- controlled oscillator
- turned
- 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.)
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Classifications
-
- 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
- H03B5/1228—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
-
- 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
- H03B5/1203—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 being a single transistor
-
- 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
- H03B5/124—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
-
- 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
- H03B5/1262—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 switched elements
- H03B5/1265—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 switched elements switched capacitors
-
- 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
- H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
- H03B2201/02—Varying the frequency of the oscillations by electronic means
- H03B2201/025—Varying the frequency of the oscillations by electronic means the means being an electronic switch for switching in or out oscillator elements
- H03B2201/0266—Varying the frequency of the oscillations by electronic means the means being an electronic switch for switching in or out oscillator elements the means comprising a transistor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
【解決手段】可変周波数範囲を大きくするために設けた並列コンデンサC3に対して並列に第2のスイッチングトランジスタP1を設け、周波数切り替えのために並列コンデンサC3に対して直列に接続された第1のスイッチングトランジスタN2がオフにされたときに、第2のスイッチングトランジスタP1がオンとなるようにすることにより、第1のスイッチングトランジスタN2がオフにされたときは、第2のスイッチングトランジスタP1のパスによって短絡されるようにして、並列コンデンサC3がフローティング状態になることを防ぐことができるようにする。
【選択図】 図1
Description
VC 可変容量ダイオード
C3 並列コンデンサ
N2 第1のスイッチングトランジスタ
P1 第2のスイッチングトランジスタ
Claims (2)
- コルピッツ発振回路と、
上記コルピッツ発振回路のコンデンサに対して並列に接続された可変容量素子と、
上記可変容量素子に対して並列に接続された並列コンデンサと、
上記可変容量素子に対して並列に、かつ上記並列コンデンサに対して直列に接続された第1のスイッチングトランジスタと、
上記並列コンデンサに対して並列に接続された第2のスイッチングトランジスタとを備え、
上記第1のスイッチングトランジスタがオフのときに、上記第2のスイッチングトランジスタがオンとなるようにしたことを特徴とする電圧制御発振器。 - 上記第1のスイッチングトランジスタはnMOSトランジスタで構成され、上記第2のスイッチングトランジスタはpMOSトランジスタで構成されていることを特徴とする請求項1に記載の電圧制御発振器。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006274971A JP2008098731A (ja) | 2006-10-06 | 2006-10-06 | 電圧制御発振器 |
TW096135553A TW200828812A (en) | 2006-10-06 | 2007-09-21 | Voltage control oscillator |
PCT/JP2007/069897 WO2008044747A1 (fr) | 2006-10-06 | 2007-10-04 | Oscillateur commandé en tension |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006274971A JP2008098731A (ja) | 2006-10-06 | 2006-10-06 | 電圧制御発振器 |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2008098731A true JP2008098731A (ja) | 2008-04-24 |
Family
ID=39282937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006274971A Pending JP2008098731A (ja) | 2006-10-06 | 2006-10-06 | 電圧制御発振器 |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP2008098731A (ja) |
TW (1) | TW200828812A (ja) |
WO (1) | WO2008044747A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6286907A (ja) * | 1985-10-11 | 1987-04-21 | Matsushima Kogyo Co Ltd | 水晶発振回路 |
JP2000091845A (ja) * | 1998-09-10 | 2000-03-31 | Mitsubishi Electric Corp | コルピッツ発振回路及び無線通信端末装置 |
JP2003017936A (ja) * | 2001-06-28 | 2003-01-17 | Kyocera Corp | 電圧制御発振器 |
JP2005529536A (ja) * | 2002-06-10 | 2005-09-29 | ジーシーティー セミコンダクター インコーポレイテッド | 広帯域同調範囲および低位相ノイズをもつlc発振器 |
-
2006
- 2006-10-06 JP JP2006274971A patent/JP2008098731A/ja active Pending
-
2007
- 2007-09-21 TW TW096135553A patent/TW200828812A/zh unknown
- 2007-10-04 WO PCT/JP2007/069897 patent/WO2008044747A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6286907A (ja) * | 1985-10-11 | 1987-04-21 | Matsushima Kogyo Co Ltd | 水晶発振回路 |
JP2000091845A (ja) * | 1998-09-10 | 2000-03-31 | Mitsubishi Electric Corp | コルピッツ発振回路及び無線通信端末装置 |
JP2003017936A (ja) * | 2001-06-28 | 2003-01-17 | Kyocera Corp | 電圧制御発振器 |
JP2005529536A (ja) * | 2002-06-10 | 2005-09-29 | ジーシーティー セミコンダクター インコーポレイテッド | 広帯域同調範囲および低位相ノイズをもつlc発振器 |
Also Published As
Publication number | Publication date |
---|---|
TW200828812A (en) | 2008-07-01 |
WO2008044747A1 (fr) | 2008-04-17 |
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