JPS6424633A - Frequency synthesizer - Google Patents

Frequency synthesizer

Info

Publication number
JPS6424633A
JPS6424633A JP62181452A JP18145287A JPS6424633A JP S6424633 A JPS6424633 A JP S6424633A JP 62181452 A JP62181452 A JP 62181452A JP 18145287 A JP18145287 A JP 18145287A JP S6424633 A JPS6424633 A JP S6424633A
Authority
JP
Japan
Prior art keywords
frequency
digital synthesizer
setting
order digit
output
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
JP62181452A
Other languages
Japanese (ja)
Inventor
Hitoshi Nishiyama
Hiroshi Takahashi
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 JP62181452A priority Critical patent/JPS6424633A/en
Publication of JPS6424633A publication Critical patent/JPS6424633A/en
Pending 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
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop

Landscapes

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

Abstract

PURPOSE:To obtain high frequency resolution and to increase the frequency setting speed by comparing the phase of an output of a high-order setting digital synthesizer with that of a fixed frequency division ratio output, controlling the oscillating frequency and coupling the result with an output of a low order digit frequency setting digital synthesizer. CONSTITUTION:The high-order digit setting side aims at outputting of a frequency unable to be outputted by a digital synthesizer itself and is provided with a digit setting digital synthesizer 31 of the same constitution as a low-order digit setting digital synthesizer 20 and with a multiplier 32 multiplying the output frequency of the digital synthesizer 31. That is, a desired frequency is decided by the digital synthesizer for both the low-order digit setting side and the high-order digit setting side. Thus, the frequency division ratio of a fixed frequency divider 33 is reduced. Since the frequency division ratio is not to be changed and the variation in the loop gain is decreased, the frequency setting speed is increased optimizingly. Moreover, since the number of digits is obtained by the digital synthesizer at the high-order digit, the output maximum frequency of the low-order digit side 20 is decreased.
JP62181452A 1987-07-21 1987-07-21 Frequency synthesizer Pending JPS6424633A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62181452A JPS6424633A (en) 1987-07-21 1987-07-21 Frequency synthesizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62181452A JPS6424633A (en) 1987-07-21 1987-07-21 Frequency synthesizer

Publications (1)

Publication Number Publication Date
JPS6424633A true JPS6424633A (en) 1989-01-26

Family

ID=16101014

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62181452A Pending JPS6424633A (en) 1987-07-21 1987-07-21 Frequency synthesizer

Country Status (1)

Country Link
JP (1) JPS6424633A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0629744A (en) * 1991-12-28 1994-02-04 Intaanix Kk Digital signal processing type reference frequency generating circuit for phase locked loop
FR2936621A1 (en) * 2008-09-30 2010-04-02 Thales Sa Digital frequency synthesizer for use in radar to deliver direct output signal, has direct digital synthesis unit delivering intermediate signal that serves to elaborate transposition signal, and possessing wide instantaneous frequency band
JP2010233078A (en) * 2009-03-27 2010-10-14 Furukawa Electric Co Ltd:The Pll circuit
KR101298621B1 (en) * 2013-03-19 2013-08-26 국방과학연구소 Fmcw synthesizer and control method thereof
JP2015527826A (en) * 2012-07-23 2015-09-17 アソシエイテッド ユニバーシティーズ，インコーポレイテッド Synthesizer method using variable frequency combline and frequency toggling

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5093764A (en) * 1973-12-20 1975-07-26
JPS618646U (en) * 1984-06-19 1986-01-18 株式会社リコー Paper feeding device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5093764A (en) * 1973-12-20 1975-07-26
JPS618646U (en) * 1984-06-19 1986-01-18 株式会社リコー Paper feeding device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0629744A (en) * 1991-12-28 1994-02-04 Intaanix Kk Digital signal processing type reference frequency generating circuit for phase locked loop
FR2936621A1 (en) * 2008-09-30 2010-04-02 Thales Sa Digital frequency synthesizer for use in radar to deliver direct output signal, has direct digital synthesis unit delivering intermediate signal that serves to elaborate transposition signal, and possessing wide instantaneous frequency band
JP2010233078A (en) * 2009-03-27 2010-10-14 Furukawa Electric Co Ltd:The Pll circuit
JP2015527826A (en) * 2012-07-23 2015-09-17 アソシエイテッド ユニバーシティーズ，インコーポレイテッド Synthesizer method using variable frequency combline and frequency toggling
KR101298621B1 (en) * 2013-03-19 2013-08-26 국방과학연구소 Fmcw synthesizer and control method thereof

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