JPS5636236A - Pll circuit - Google Patents

Pll circuit

Info

Publication number
JPS5636236A
JPS5636236A JP11168779A JP11168779A JPS5636236A JP S5636236 A JPS5636236 A JP S5636236A JP 11168779 A JP11168779 A JP 11168779A JP 11168779 A JP11168779 A JP 11168779A JP S5636236 A JPS5636236 A JP S5636236A
Authority
JP
Japan
Prior art keywords
pulse
turned
transistor
leading
transistors
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.)
Granted
Application number
JP11168779A
Other languages
Japanese (ja)
Other versions
JPS6356724B2 (en
Inventor
Himio Nakagawa
Mitsuru Kudo
Takatoshi Togami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11168779A priority Critical patent/JPS5636236A/en
Publication of JPS5636236A publication Critical patent/JPS5636236A/en
Publication of JPS6356724B2 publication Critical patent/JPS6356724B2/ja
Granted legal-status Critical Current

Links

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

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To make it possible to set freely a ripple quantity and a leading-in range, by generating a pulse, which includes the detection current flowing section for phase synchronization, besides the square wave used for phase detection and by controlling the current source by this generated pulse. CONSTITUTION:Output 6a of the VCO is divided in the frequency dividing circuit by 1/N to generate pulse 6f wider than pulse 6c synchronously with pulse 6e of duty 50%. When pulse 6f from terminal (f) is ''H'', transistor Q11 is turned on, and transistor Q12 is always turned off. When reference pulse 6c becomes ''H'', only transistor Q1 is turned on to operate transistors Q2 and Q3. When pulse 6f is ''L'', transistors Q12 and Q1 are turned on to operate Q2 and Q3 if reference pulse 6c is ''H''; and therefore, since the current is increased, the ripple quantity of the output is reduced, and the leading-in range can be changed.
JP11168779A 1979-09-03 1979-09-03 Pll circuit Granted JPS5636236A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11168779A JPS5636236A (en) 1979-09-03 1979-09-03 Pll circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11168779A JPS5636236A (en) 1979-09-03 1979-09-03 Pll circuit

Publications (2)

Publication Number Publication Date
JPS5636236A true JPS5636236A (en) 1981-04-09
JPS6356724B2 JPS6356724B2 (en) 1988-11-09

Family

ID=14567621

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11168779A Granted JPS5636236A (en) 1979-09-03 1979-09-03 Pll circuit

Country Status (1)

Country Link
JP (1) JPS5636236A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58501611A (en) * 1981-09-28 1983-09-22 ハネウエル・インコ−ポレ−テツド Device for preventing errors induced by transients in a phase lock loop

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58501611A (en) * 1981-09-28 1983-09-22 ハネウエル・インコ−ポレ−テツド Device for preventing errors induced by transients in a phase lock loop

Also Published As

Publication number Publication date
JPS6356724B2 (en) 1988-11-09

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