JPS6411419A - Frequency synthesizer - Google Patents

Frequency synthesizer

Info

Publication number
JPS6411419A
JPS6411419A JP62165289A JP16528987A JPS6411419A JP S6411419 A JPS6411419 A JP S6411419A JP 62165289 A JP62165289 A JP 62165289A JP 16528987 A JP16528987 A JP 16528987A JP S6411419 A JPS6411419 A JP S6411419A
Authority
JP
Japan
Prior art keywords
frequency
circuit
time
application time
variation
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.)
Pending
Application number
JP62165289A
Other languages
Japanese (ja)
Inventor
Hiroichi Yanagawa
Hiroyoshi Oka
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.)
Anritsu Corp
Original Assignee
Anritsu Corp
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 Anritsu Corp filed Critical Anritsu Corp
Priority to JP62165289A priority Critical patent/JPS6411419A/en
Publication of JPS6411419A publication Critical patent/JPS6411419A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To complete the variation of a set frequency in a short time by applying a fixed voltage forcibly to the capacitor of a time constant circuit of a filter circuit for a time corresponding to a frequency difference when the set frequency is varied. CONSTITUTION:When a new set frequency is inputted from a frequency setter 25, a frequency divider 13 is set to a corresponding frequency division ratio and a corresponding application time is calculated at the same time. For example, when the frequency is increased, a switching circuit 18 operates to apply the fixed voltage to the filter circuit 15 for the application time. The capacitor 15d is charged the application time later and a control voltage signal (d) outputted from the circuit 15 rises by an output voltage variation quantity. The circuit 18 returns to its last state the application time later and a signal from a frequency divider 13 is inputted to a phase comparator 12 and approximate to the set frequency after the variation. This PLL circuit is therefore put in phase in the short PLL response time.
JP62165289A 1987-07-03 1987-07-03 Frequency synthesizer Pending JPS6411419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62165289A JPS6411419A (en) 1987-07-03 1987-07-03 Frequency synthesizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62165289A JPS6411419A (en) 1987-07-03 1987-07-03 Frequency synthesizer

Publications (1)

Publication Number Publication Date
JPS6411419A true JPS6411419A (en) 1989-01-17

Family

ID=15809499

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62165289A Pending JPS6411419A (en) 1987-07-03 1987-07-03 Frequency synthesizer

Country Status (1)

Country Link
JP (1) JPS6411419A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007274081A (en) * 2006-03-30 2007-10-18 Mitsubishi Electric Corp Phase locked loop type frequency synthesizer
JP2008060688A (en) * 2006-08-29 2008-03-13 Yokogawa Electric Corp Phase-locked loop circuit and signal generator unit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5856535A (en) * 1981-09-30 1983-04-04 Fujitsu Ltd Oscillation circuit
JPS5843045B2 (en) * 1980-06-25 1983-09-24 耕一 南田 How to dye trees

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5843045B2 (en) * 1980-06-25 1983-09-24 耕一 南田 How to dye trees
JPS5856535A (en) * 1981-09-30 1983-04-04 Fujitsu Ltd Oscillation circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007274081A (en) * 2006-03-30 2007-10-18 Mitsubishi Electric Corp Phase locked loop type frequency synthesizer
JP2008060688A (en) * 2006-08-29 2008-03-13 Yokogawa Electric Corp Phase-locked loop circuit and signal generator unit

Similar Documents

Publication Publication Date Title
US4673892A (en) Phase locked loop frequency synthesizer with battery saving circuit
EP0840456A3 (en) PLL frequency synthesizer capable of changing an output frequency at a high speed
JPS57162527A (en) Setting device for preset voltage of frequency synthesizer
US4841255A (en) Frequency synthesizer
JPS57112137A (en) Frequency synthesizer
JPS6411419A (en) Frequency synthesizer
JPS6485424A (en) Phase/frequency comparing circuit
JPS57195311A (en) Clock regenerating circuit
JPS5570134A (en) Synchronous circuit
JPS55117337A (en) Phase synchronous oscillator
JPS56104545A (en) Division ratio setting circuit of pll
SU1067594A1 (en) Sawtooth voltage generator
JPS5459864A (en) Frequency divider circuit
JPS5464956A (en) Pll circuit
JPS63219221A (en) Clock frequency multiplier circuit
JPS5483752A (en) Pll frequency synthesizer system
JPS5787241A (en) Phase synchronizing circuit for optional frequency conversion
JPH0376427A (en) Pll circuit
JPS57174928A (en) Adjusting circuit for delay time
JPS5497355A (en) Oscillation circuit
SU1312732A1 (en) Frequency synthesizer
JPS6444123A (en) Pll circuit
SU1515336A1 (en) Digital frequency synthesizer
JPS5479549A (en) Phase synchronizing control circuit
JPS54129959A (en) Phase lock loop circuit