JPS5577209A - Signal generating circuit - Google Patents

Signal generating circuit

Info

Publication number
JPS5577209A
JPS5577209A JP15339578A JP15339578A JPS5577209A JP S5577209 A JPS5577209 A JP S5577209A JP 15339578 A JP15339578 A JP 15339578A JP 15339578 A JP15339578 A JP 15339578A JP S5577209 A JPS5577209 A JP S5577209A
Authority
JP
Japan
Prior art keywords
roms
sampled values
phase
fixed
high precision
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
JP15339578A
Other languages
Japanese (ja)
Inventor
Kiyohide Kitagawa
Shuichi Ooka
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15339578A priority Critical patent/JPS5577209A/en
Publication of JPS5577209A publication Critical patent/JPS5577209A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B27/00—Generation of oscillations providing a plurality of outputs of the same frequency but differing in phase, other than merely two anti-phase outputs

Abstract

PURPOSE:To make it possible to two signal with a fixed phase difference with high precision by simultaneously reading sampled values of two periodic waveforms from two memory circuits and by converting them into analog values before mixing them with the output of a reference oscillator. CONSTITUTION:In ROMs 5 and 6, digital codes are stored which express sampled values of two periodical waveform mutually differing in phase as long as certain cycles, and driver circuit 7 reads sampled values of two periodic waveforms from ROMs 5 and 6 at the same time. Then, D/A converters 8 and 9 convert outputs of ROMs 5 and 6 into analog signals respectively, which are mixed with the output of reference oscillator 1, and frequency converting processes 10 and 11 into the same fixed frequency are carried out. Consequently, two signals with a fixed difference in phase can be obtained with high precision.
JP15339578A 1978-12-06 1978-12-06 Signal generating circuit Pending JPS5577209A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15339578A JPS5577209A (en) 1978-12-06 1978-12-06 Signal generating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15339578A JPS5577209A (en) 1978-12-06 1978-12-06 Signal generating circuit

Publications (1)

Publication Number Publication Date
JPS5577209A true JPS5577209A (en) 1980-06-10

Family

ID=15561547

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15339578A Pending JPS5577209A (en) 1978-12-06 1978-12-06 Signal generating circuit

Country Status (1)

Country Link
JP (1) JPS5577209A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494073A (en) * 1982-09-27 1985-01-15 Cubic Corporation Frequency generator using composite digitally controlled oscillators
US4905177A (en) * 1988-01-19 1990-02-27 Qualcomm, Inc. High resolution phase to sine amplitude conversion
US4926130A (en) * 1988-01-19 1990-05-15 Qualcomm, Inc. Synchronous up-conversion direct digital synthesizer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494073A (en) * 1982-09-27 1985-01-15 Cubic Corporation Frequency generator using composite digitally controlled oscillators
US4905177A (en) * 1988-01-19 1990-02-27 Qualcomm, Inc. High resolution phase to sine amplitude conversion
US4926130A (en) * 1988-01-19 1990-05-15 Qualcomm, Inc. Synchronous up-conversion direct digital synthesizer

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