JPS5558630A - Asynchronous type reversible counter - Google Patents

Asynchronous type reversible counter

Info

Publication number
JPS5558630A
JPS5558630A JP13192078A JP13192078A JPS5558630A JP S5558630 A JPS5558630 A JP S5558630A JP 13192078 A JP13192078 A JP 13192078A JP 13192078 A JP13192078 A JP 13192078A JP S5558630 A JPS5558630 A JP S5558630A
Authority
JP
Japan
Prior art keywords
asynchronous
reversible counter
down switching
count
states
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
JP13192078A
Other languages
Japanese (ja)
Other versions
JPS5951785B2 (en
Inventor
Koji Nakagome
Takayuki Nakajima
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.)
Advantest Corp
Original Assignee
Advantest Corp
Takeda Riken Industries 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 Advantest Corp, Takeda Riken Industries Co Ltd filed Critical Advantest Corp
Priority to JP13192078A priority Critical patent/JPS5951785B2/en
Publication of JPS5558630A publication Critical patent/JPS5558630A/en
Publication of JPS5951785B2 publication Critical patent/JPS5951785B2/en
Expired 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
    • H03K23/62—Gating or clocking signals not applied to all stages, i.e. asynchronous counters reversible

Landscapes

  • Shift Register Type Memory (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To realize an asynchronous up/down counter circuit which does not generate malfunctions, by providing an up/down switching gate between cascaded flip flops and providing a register to store the counted value. CONSTITUTION:FF1-FF8 which constitute an asynchronous counter are cascaded, and gate circuits G1-G3 are arranged between adjacent FFs respectively. When up/ down switching terminal 18 is H-level, the Q output of each FF is inputted to the trigger of the succeeding-stage FF to perform up-count. When up/down switching is performed, a store signal is given to terminal 36, and states of FF1-FF4 are given to FF5-FF8. Next, after resetting FF1-FF4, states of FF5-FF8 are transferred to FF1-FF4 to start down-count.
JP13192078A 1978-10-25 1978-10-25 Asynchronous reversible counter Expired JPS5951785B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13192078A JPS5951785B2 (en) 1978-10-25 1978-10-25 Asynchronous reversible counter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13192078A JPS5951785B2 (en) 1978-10-25 1978-10-25 Asynchronous reversible counter

Publications (2)

Publication Number Publication Date
JPS5558630A true JPS5558630A (en) 1980-05-01
JPS5951785B2 JPS5951785B2 (en) 1984-12-15

Family

ID=15069276

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13192078A Expired JPS5951785B2 (en) 1978-10-25 1978-10-25 Asynchronous reversible counter

Country Status (1)

Country Link
JP (1) JPS5951785B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002216A1 (en) * 1984-10-08 1986-04-10 Koyo Denshi Kogyo Kabushiki Kaisha Counter apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002216A1 (en) * 1984-10-08 1986-04-10 Koyo Denshi Kogyo Kabushiki Kaisha Counter apparatus

Also Published As

Publication number Publication date
JPS5951785B2 (en) 1984-12-15

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