JPS6477223A - Frequency dividing circuit - Google Patents

Frequency dividing circuit

Info

Publication number
JPS6477223A
JPS6477223A JP23256087A JP23256087A JPS6477223A JP S6477223 A JPS6477223 A JP S6477223A JP 23256087 A JP23256087 A JP 23256087A JP 23256087 A JP23256087 A JP 23256087A JP S6477223 A JPS6477223 A JP S6477223A
Authority
JP
Japan
Prior art keywords
prescaler
frequency
psc
frequency division
divides
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
JP23256087A
Other languages
Japanese (ja)
Other versions
JP2530663B2 (en
Inventor
Yoshihiko Hayashi
Akio Osaki
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 JP62232560A priority Critical patent/JP2530663B2/en
Publication of JPS6477223A publication Critical patent/JPS6477223A/en
Application granted granted Critical
Publication of JP2530663B2 publication Critical patent/JP2530663B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To extend an operating frequency range and a variable range by controlling a prescaler only in one frequency division cycle by a terminal count signal of a preset counter in a frequency dividing circuit consisting of the prescaler consisting of plural D FFs and the preset counter. CONSTITUTION:Normally, a prescaler 100 supplies an N-divided clock to a preset counter (PSC) 11. The PSC 11 counts the N-divided clock, and the PSC 11 sends a terminal count signal TC to the prescaler 100 when terminating prescribed counting. The prescaler 100 divides the frequency by one of preliminarily set N-2N-1 in on frequency division cycle after reception of the signal TC. Then, the PSC 11 divides the frequency of the N-divided clock by K (>=0), and thereafter, the prescaler divides the frequency by J (N<=J<=2N-1) only in one frequency division cycle after the N-division operation. Thus, a frequency division number M obtained by the PSC 11 and the prescaler 100 is J+K.N and frequency division is continuously performed from N-division.
JP62232560A 1987-09-18 1987-09-18 Divider circuit Expired - Lifetime JP2530663B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62232560A JP2530663B2 (en) 1987-09-18 1987-09-18 Divider circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62232560A JP2530663B2 (en) 1987-09-18 1987-09-18 Divider circuit

Publications (2)

Publication Number Publication Date
JPS6477223A true JPS6477223A (en) 1989-03-23
JP2530663B2 JP2530663B2 (en) 1996-09-04

Family

ID=16941243

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62232560A Expired - Lifetime JP2530663B2 (en) 1987-09-18 1987-09-18 Divider circuit

Country Status (1)

Country Link
JP (1) JP2530663B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5787344A (en) * 1994-06-28 1998-07-28 Scheinert; Stefan Arrangements of base transceiver stations of an area-covering network
US6263200B1 (en) 1996-12-26 2001-07-17 Nec Corporation Radio terminal apparatus equipped with battery power saving function, and mobile communication system using the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52108762A (en) * 1976-03-09 1977-09-12 Toshiba Corp Frequency division circuit
JPS5429954A (en) * 1977-08-10 1979-03-06 Seiko Epson Corp Frequency devider circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52108762A (en) * 1976-03-09 1977-09-12 Toshiba Corp Frequency division circuit
JPS5429954A (en) * 1977-08-10 1979-03-06 Seiko Epson Corp Frequency devider circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5787344A (en) * 1994-06-28 1998-07-28 Scheinert; Stefan Arrangements of base transceiver stations of an area-covering network
USRE37820E1 (en) * 1994-06-28 2002-08-13 Littlefeet, Inc. Arrangements of base transceiver stations of an area-covering network
US6263200B1 (en) 1996-12-26 2001-07-17 Nec Corporation Radio terminal apparatus equipped with battery power saving function, and mobile communication system using the same

Also Published As

Publication number Publication date
JP2530663B2 (en) 1996-09-04

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