JP2006245860A - 電圧制御型発振器 - Google Patents
電圧制御型発振器 Download PDFInfo
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- JP2006245860A JP2006245860A JP2005057104A JP2005057104A JP2006245860A JP 2006245860 A JP2006245860 A JP 2006245860A JP 2005057104 A JP2005057104 A JP 2005057104A JP 2005057104 A JP2005057104 A JP 2005057104A JP 2006245860 A JP2006245860 A JP 2006245860A
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- mos transistor
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 37
- 230000010355 oscillation Effects 0.000 claims abstract description 20
- 239000004065 semiconductor Substances 0.000 claims description 5
- 230000000052 comparative effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
- H03L7/0995—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop the oscillator comprising a ring oscillator
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- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
【解決手段】制御電圧に応じた周波数で発振動作する電圧制御型発振器は、制御電圧VINを、電圧値に応じた制御電流に変換する電圧電流変換回路と、電圧電流変換回路により生成された制御電流に対応する動作電流が流されて電流値に応じた周波数で発振するリングオシレータ200とを有し、電圧電流変換回路は、制御電圧VINが入力され電圧値に応じた制御電流に変換する電圧−電圧変換回路100と、制御電流に定電流を付加するオフセット電流発生回路500とを有する。
【選択図】図1
Description
I=(2/β)×(1/R2)×(1-1/√K)2
β=(W/L)×μ×COX
ここで、μ:キャリア移動度
Cox:単位面積当りのゲート酸化膜容量
上式で示されるように、定電流源600は、電源電圧に依存しない定電流を発生することができる。定電流源600では、p型MOSトランジスタP620とゲート端子を共通にしたp型MOSトランジスタP630を設けて、カレントミラーを構成し、定電流を電圧制御型発振器に供給する。
200 リングオシレータ
500 オフセット電流発生回路
600 定電流源
N110, N201, N202, N203, N510, N520, N610, N620 n型MOSトランジスタ
P110, P201, P202, P203, P610, P620, P630 p型MOSトランジスタ
Claims (3)
- 制御電圧に応じた周波数で発振動作する電圧制御型発振器において、該電圧制御型発振器は、
前記制御電圧を、該電圧値に応じた制御電流に変換する電圧−電流変換回路と、
該電圧−電流変換回路により生成された制御電流に対応する動作電流が流されて該電流値に応じた周波数で発振する発振回路とを有し、
前記電圧−電流変換回路は、前記制御電圧が入力され該電圧値に応じた制御電流に変換する半導体回路と、該制御電流に定電流を付加する定電流付加回路とを有することを特徴とする電圧制御型発振器。 - 請求項1に記載の電圧制御型発振器において、前記発振回路は、複数の論理ゲートが縦続接続され、かつ最終段の出力が初段の入力に帰還されてなるリング発振器であり、前記動作電流は前記論理ゲートに流される電流であることを特徴とする電圧制御型発振器。
- 請求項2に記載の電圧制御型発振器において、
前記電圧−電流変換回路は、前記制御電流がドレインに流れるMOSトランジスタであり、
前記論理ゲートには、該MOSトランジスタとカレントミラー接続された電流制御用のMOSトランジスタが接続され、該MOSトランジスタにより前記制御電流に対応した動作電流が前記論理ゲートに流れることを特徴とする電圧制御型発振器。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005057104A JP4464294B2 (ja) | 2005-03-02 | 2005-03-02 | 電圧制御型発振器 |
US11/346,296 US7679467B2 (en) | 2005-03-02 | 2006-02-03 | Voltage controlled oscillator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005057104A JP4464294B2 (ja) | 2005-03-02 | 2005-03-02 | 電圧制御型発振器 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006245860A true JP2006245860A (ja) | 2006-09-14 |
JP4464294B2 JP4464294B2 (ja) | 2010-05-19 |
Family
ID=36943585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005057104A Active JP4464294B2 (ja) | 2005-03-02 | 2005-03-02 | 電圧制御型発振器 |
Country Status (2)
Country | Link |
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US (1) | US7679467B2 (ja) |
JP (1) | JP4464294B2 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008283333A (ja) * | 2007-05-09 | 2008-11-20 | Seiko Npc Corp | 電圧制御発振器およびそれを用いたpll回路 |
JP2009100449A (ja) * | 2007-09-28 | 2009-05-07 | Rohm Co Ltd | オシレータ |
JP2009141393A (ja) * | 2007-12-03 | 2009-06-25 | Nec Electronics Corp | 電圧電流変換回路、及び電圧制御発振回路 |
US9054633B2 (en) | 2013-01-22 | 2015-06-09 | Kabushiki Kaisha Toshiba | Bias current circuit and semiconductor integrated circuit |
JPWO2017195614A1 (ja) * | 2016-05-11 | 2019-03-14 | ソニー株式会社 | 発振回路、発振方法、およびpll回路 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI481195B (zh) * | 2006-10-31 | 2015-04-11 | 半導體能源研究所股份有限公司 | 振盪器電路及包含該振盪器電路的半導體裝置 |
JP2009182584A (ja) * | 2008-01-30 | 2009-08-13 | Nec Electronics Corp | Pll回路 |
US7791420B2 (en) * | 2008-12-09 | 2010-09-07 | Taiwan Semiconductor Manufacturing Company, Ltd. | Phase-locked loop with start-up circuit |
US8581667B2 (en) * | 2011-11-11 | 2013-11-12 | Qualcomm Incorporated | Tuning voltage range extension circuit and method |
US10938380B1 (en) * | 2019-12-09 | 2021-03-02 | Apple Inc. | Method and apparatus for bias current trimming |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62290208A (ja) | 1986-06-09 | 1987-12-17 | Nec Corp | 電流制御オシレ−タ |
JPS6477222A (en) | 1987-09-18 | 1989-03-23 | Hitachi Ltd | I2l integrated circuit |
US5412349A (en) * | 1992-03-31 | 1995-05-02 | Intel Corporation | PLL clock generator integrated with microprocessor |
JPH0918253A (ja) | 1995-06-30 | 1997-01-17 | Texas Instr Japan Ltd | 演算増幅回路 |
US6275116B1 (en) * | 1999-06-08 | 2001-08-14 | Cypress Semiconductor Corp. | Method, circuit and/or architecture to improve the frequency range of a voltage controlled oscillator |
US6396357B1 (en) * | 2000-05-01 | 2002-05-28 | Agere Systems Guardian Corp. | Low voltage differential voltage-controlled ring oscillator |
JP2002223149A (ja) | 2001-01-29 | 2002-08-09 | Hitachi Ltd | 半導体集積回路 |
JP2003198333A (ja) | 2001-12-28 | 2003-07-11 | Asahi Kasei Microsystems Kk | 発振器 |
JP2003229764A (ja) | 2002-02-01 | 2003-08-15 | Hitachi Ltd | 半導体集積回路 |
-
2005
- 2005-03-02 JP JP2005057104A patent/JP4464294B2/ja active Active
-
2006
- 2006-02-03 US US11/346,296 patent/US7679467B2/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008283333A (ja) * | 2007-05-09 | 2008-11-20 | Seiko Npc Corp | 電圧制御発振器およびそれを用いたpll回路 |
JP2009100449A (ja) * | 2007-09-28 | 2009-05-07 | Rohm Co Ltd | オシレータ |
JP2009141393A (ja) * | 2007-12-03 | 2009-06-25 | Nec Electronics Corp | 電圧電流変換回路、及び電圧制御発振回路 |
US9054633B2 (en) | 2013-01-22 | 2015-06-09 | Kabushiki Kaisha Toshiba | Bias current circuit and semiconductor integrated circuit |
JPWO2017195614A1 (ja) * | 2016-05-11 | 2019-03-14 | ソニー株式会社 | 発振回路、発振方法、およびpll回路 |
Also Published As
Publication number | Publication date |
---|---|
JP4464294B2 (ja) | 2010-05-19 |
US20060197610A1 (en) | 2006-09-07 |
US7679467B2 (en) | 2010-03-16 |
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