JPS57106220A - Time ratio signal generating device - Google Patents

Time ratio signal generating device

Info

Publication number
JPS57106220A
JPS57106220A JP55182395A JP18239580A JPS57106220A JP S57106220 A JPS57106220 A JP S57106220A JP 55182395 A JP55182395 A JP 55182395A JP 18239580 A JP18239580 A JP 18239580A JP S57106220 A JPS57106220 A JP S57106220A
Authority
JP
Japan
Prior art keywords
ram211
address
duty ratio
time ratio
generating device
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
JP55182395A
Other languages
Japanese (ja)
Inventor
Yasuo Furukawa
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 JP55182395A priority Critical patent/JPS57106220A/en
Publication of JPS57106220A publication Critical patent/JPS57106220A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/13—Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals
    • H03K5/135—Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals by the use of time reference signals, e.g. clock signals

Abstract

PURPOSE:To generate a square wave having a time ratio corresponding to a digital value with simple constitution, by using an RAM instead of a comparator. CONSTITUTION:Addresses of an RAM211 are accessed in order from address 0 to the last address by the count output of a counter 112. Information to determine a duty ratio is stored in a proper address, namely, an address corresponding to a desired duty ratio in the RAM211. For example, if the RAM211 has addresses 0-100 and a square wave of 50% duty ratio is desired, H logic is written in address 50 of the RAM211. This information is written by digital data 114. The read output of the RAM211 is supplied to, for example, a set terminal S of a flip-flop 115, and the overflow output of the counter 112 is supplied to a reset terminal R of the flip-flop 115.
JP55182395A 1980-12-22 1980-12-22 Time ratio signal generating device Pending JPS57106220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55182395A JPS57106220A (en) 1980-12-22 1980-12-22 Time ratio signal generating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55182395A JPS57106220A (en) 1980-12-22 1980-12-22 Time ratio signal generating device

Publications (1)

Publication Number Publication Date
JPS57106220A true JPS57106220A (en) 1982-07-02

Family

ID=16117561

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55182395A Pending JPS57106220A (en) 1980-12-22 1980-12-22 Time ratio signal generating device

Country Status (1)

Country Link
JP (1) JPS57106220A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6184121A (en) * 1984-10-02 1986-04-28 Canon Inc Digital-analog converter
JPS6184120A (en) * 1984-10-02 1986-04-28 Canon Inc Digital-analog converter
JPS6184117A (en) * 1984-10-02 1986-04-28 Canon Inc Digital-analog converter
JPS6184118A (en) * 1984-10-02 1986-04-28 Canon Inc Digital-analog converter
JPS6184119A (en) * 1984-10-02 1986-04-28 Canon Inc Digital-analog converter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50137666A (en) * 1974-04-22 1975-10-31
JPS53140959A (en) * 1977-05-14 1978-12-08 Fujitsu Ltd Counter circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50137666A (en) * 1974-04-22 1975-10-31
JPS53140959A (en) * 1977-05-14 1978-12-08 Fujitsu Ltd Counter circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6184121A (en) * 1984-10-02 1986-04-28 Canon Inc Digital-analog converter
JPS6184120A (en) * 1984-10-02 1986-04-28 Canon Inc Digital-analog converter
JPS6184117A (en) * 1984-10-02 1986-04-28 Canon Inc Digital-analog converter
JPS6184118A (en) * 1984-10-02 1986-04-28 Canon Inc Digital-analog converter
JPS6184119A (en) * 1984-10-02 1986-04-28 Canon Inc Digital-analog converter

Similar Documents

Publication Publication Date Title
JPS6437125A (en) Cross coding method and device therefor
JPS57106220A (en) Time ratio signal generating device
JPS5759243A (en) Buffer circuit
JPS5528644A (en) Memory unit
JPS5443630A (en) Memory access control system
CA2081757A1 (en) Variable frequency signal generating method
JPS5374022A (en) Sound volume envelop setting system in electronic musical instrument
JPS57111669A (en) Output system for conjugation form of word
JPS57193853A (en) Histogram generating device
JPS5437713A (en) Musical tone production system in electronic musical instrument
JPS57179982A (en) Memory device
JPS54126006A (en) Information service device
JPS5538668A (en) Memory unit
JPS5493940A (en) Correcting unit of code word error
JPS57172589A (en) Memory access circuit
JPS57185720A (en) Digital pattern generating circuit
JPS5268406A (en) Electronic musical instrument
JPS56169949A (en) Multiplex processing circuit
JPS5724120A (en) Data arrangement conversion circuit
JPS54139314A (en) Signal generator
JPS524226A (en) Keyboard input unit
TW259868B (en) Delay circuit
JPS57138238A (en) Synchronizing pattern generating circuit
JPS5732196A (en) Channel converter
JPS5492136A (en) Memory unit testing system