JPS57152723A - Digital frequency multiplier - Google Patents

Digital frequency multiplier

Info

Publication number
JPS57152723A
JPS57152723A JP56038478A JP3847881A JPS57152723A JP S57152723 A JPS57152723 A JP S57152723A JP 56038478 A JP56038478 A JP 56038478A JP 3847881 A JP3847881 A JP 3847881A JP S57152723 A JPS57152723 A JP S57152723A
Authority
JP
Japan
Prior art keywords
sine wave
multiplier
output
input sine
amplitude
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
JP56038478A
Other languages
Japanese (ja)
Inventor
Kenji Nakayama
Yutaka Ishikawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56038478A priority Critical patent/JPS57152723A/en
Publication of JPS57152723A publication Critical patent/JPS57152723A/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
    • H03B19/00—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source

Landscapes

  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To keep the phase between an input sine wave and a multiplied output sine wave constant, by squaring the input sine wave and subtracting the square value of the amplitude of the input sine wave from the output of this squaring and multiplying the subtraction result by the reciprocal of the amplitude of the input sine wave. CONSTITUTION:An input sine wave is denoted as Acos(omegat+psi). The input sine wave is squared by a multiplier 2, and a square value A<2> of the amplitude of the input sine wave is obtained by a level detector 4 and is applied to a subtractor 6. Sine the amplitude of the output of the multiplier 2 is multiplied in a doubling multiplier 3 by 2, the output of the subtractor 6 becomes A<2>{2cos<2> (omegat+psi)-1}and is applied to a multiplier 8. The value of 1/A is obtained by a reciprocal generator 7 and is applied to the multiplier, and the output of the multiplier 8 becomes A{2cos<2>(omegat+psi)-1}, and thus, a sine wave having a two- fold frequency is obtained at an output terminal 9.
JP56038478A 1981-03-17 1981-03-17 Digital frequency multiplier Pending JPS57152723A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56038478A JPS57152723A (en) 1981-03-17 1981-03-17 Digital frequency multiplier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56038478A JPS57152723A (en) 1981-03-17 1981-03-17 Digital frequency multiplier

Publications (1)

Publication Number Publication Date
JPS57152723A true JPS57152723A (en) 1982-09-21

Family

ID=12526359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56038478A Pending JPS57152723A (en) 1981-03-17 1981-03-17 Digital frequency multiplier

Country Status (1)

Country Link
JP (1) JPS57152723A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62109440A (en) * 1985-11-07 1987-05-20 Matsushita Electric Ind Co Ltd Multiplex demodulation device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5138858A (en) * 1974-09-27 1976-03-31 Matsushita Electric Ind Co Ltd SHUHASUTEIBAIKAIRO
JPS5432056A (en) * 1977-08-16 1979-03-09 Toshiba Corp Frequency multiplying circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5138858A (en) * 1974-09-27 1976-03-31 Matsushita Electric Ind Co Ltd SHUHASUTEIBAIKAIRO
JPS5432056A (en) * 1977-08-16 1979-03-09 Toshiba Corp Frequency multiplying circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62109440A (en) * 1985-11-07 1987-05-20 Matsushita Electric Ind Co Ltd Multiplex demodulation device

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