JPS57103434A - Frequency dividing circuit - Google Patents

Frequency dividing circuit

Info

Publication number
JPS57103434A
JPS57103434A JP17946880A JP17946880A JPS57103434A JP S57103434 A JPS57103434 A JP S57103434A JP 17946880 A JP17946880 A JP 17946880A JP 17946880 A JP17946880 A JP 17946880A JP S57103434 A JPS57103434 A JP S57103434A
Authority
JP
Japan
Prior art keywords
frequency divider
trs
stage
blocks
succeeding
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
JP17946880A
Other languages
Japanese (ja)
Inventor
Haruyasu Yamada
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP17946880A priority Critical patent/JPS57103434A/en
Publication of JPS57103434A publication Critical patent/JPS57103434A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
    • H03K23/58—Gating or clocking signals not applied to all stages, i.e. asynchronous counters

Landscapes

  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To reduce the power consumption, by applying a power source voltage lower than that for a 1/2 frequency divider of the succeeding stage to a 1/2 frequency divider of the preceding stage and by connecting the output of the frequency divider of the preceding stage to the input of the frequency divider of the succeeding stage directly. CONSTITUTION:Since an input signal VIN connected to terminals 12 and 13 is connected with opposite polarities between preceding and succeeding blocks 1-1 and 2-1, an FF of transistors TRs 26 and 25 is inverted in the block 1-1 when the signal VIN is H, and an FF of TRs 27 and 28 is inverted in the block 2-1 when the signal VIN is L, and the 1/2 frequency dividing operation is executed, respectively. Voltages supplied to load resistances 38-41 of blocks 1-1 and 2-1 are given through a TR42 from a bias voltage VB2 of a terminal 44 lower than a voltage Vcc of a terminal 43. Output terminals 47 and 48 of the block 2-1 are connected directly to the input of a differential amplifier consisting of TRs 49- 52 of blocks 1-2 and 2-2 of a 1/2 frequency divider of the preceding stage, and the output of a 1/2 frequency divider of the succeeding stage has the level shifted by emitter follower TRs 53 and 54 and diodes 55-58 and is outputted from output terminals 59 and 60.
JP17946880A 1980-12-17 1980-12-17 Frequency dividing circuit Pending JPS57103434A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17946880A JPS57103434A (en) 1980-12-17 1980-12-17 Frequency dividing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17946880A JPS57103434A (en) 1980-12-17 1980-12-17 Frequency dividing circuit

Publications (1)

Publication Number Publication Date
JPS57103434A true JPS57103434A (en) 1982-06-28

Family

ID=16066370

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17946880A Pending JPS57103434A (en) 1980-12-17 1980-12-17 Frequency dividing circuit

Country Status (1)

Country Link
JP (1) JPS57103434A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1020031B1 (en) * 1997-10-03 2003-10-01 Cambridge Silicon Radio Limited Integrated circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1020031B1 (en) * 1997-10-03 2003-10-01 Cambridge Silicon Radio Limited Integrated circuit
US7091756B2 (en) 1997-10-03 2006-08-15 Cambridge Silicon Radio Limited Integrated circuit

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