JP2010206453A5 - PLL circuit - Google Patents

PLL circuit Download PDF

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Publication number
JP2010206453A5
JP2010206453A5 JP2009049005A JP2009049005A JP2010206453A5 JP 2010206453 A5 JP2010206453 A5 JP 2010206453A5 JP 2009049005 A JP2009049005 A JP 2009049005A JP 2009049005 A JP2009049005 A JP 2009049005A JP 2010206453 A5 JP2010206453 A5 JP 2010206453A5
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JP
Japan
Prior art keywords
control voltage
pll circuit
circuit
predetermined range
detection process
Prior art date
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Pending
Application number
JP2009049005A
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Japanese (ja)
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JP2010206453A (en
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Publication date
Application filed filed Critical
Priority to JP2009049005A priority Critical patent/JP2010206453A/en
Priority claimed from JP2009049005A external-priority patent/JP2010206453A/en
Publication of JP2010206453A publication Critical patent/JP2010206453A/en
Publication of JP2010206453A5 publication Critical patent/JP2010206453A5/en
Pending legal-status Critical Current

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Claims (1)

制御電圧を可変させることで周波数を動的に変動することが可能な電圧制御発振回路と、前記制御電圧が所定の範囲に含まれているかを判定する制御電圧レンジ検出処理を行う検出回路と、を含むＰＬＬ回路であって、
前記検出回路は前記制御電圧レンジ検出処理で前記制御電圧が前記所定の範囲に含まれていない際に周波数ロックが外れたことを示すＬＫＤＥＴＢ信号を出力することを特徴とするＰＬＬ回路。 A voltage control oscillation circuit capable of dynamically changing the frequency by varying the control voltage; and a detection circuit performing a control voltage range detection process of determining whether the control voltage is included in a predetermined range; A PLL circuit that includes
The PLL circuit, wherein the detection circuit outputs an LKDETB signal indicating that the frequency lock is released when the control voltage is not included in the predetermined range in the control voltage range detection process.
JP2009049005A 2009-03-03 2009-03-03 Pll circuit, transceiver and portable information terminal Pending JP2010206453A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009049005A JP2010206453A (en) 2009-03-03 2009-03-03 Pll circuit, transceiver and portable information terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009049005A JP2010206453A (en) 2009-03-03 2009-03-03 Pll circuit, transceiver and portable information terminal

Publications (2)

Publication Number Publication Date
JP2010206453A JP2010206453A (en) 2010-09-16
JP2010206453A5 true JP2010206453A5 (en) 2012-03-22

Family

ID=42967499

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009049005A Pending JP2010206453A (en) 2009-03-03 2009-03-03 Pll circuit, transceiver and portable information terminal

Country Status (1)

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JP (1) JP2010206453A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5686864A (en) * 1995-09-05 1997-11-11 Motorola, Inc. Method and apparatus for controlling a voltage controlled oscillator tuning range in a frequency synthesizer
JPH09246962A (en) * 1996-03-08 1997-09-19 Nec Corp Phase locked loop voltage controlled oscillator
JP2002271193A (en) * 2001-03-06 2002-09-20 Fujitsu Ltd Phase-locked oscillator and communication device

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