JPS54154211A - Local oscillation circuit - Google Patents

Local oscillation circuit

Info

Publication number
JPS54154211A
JPS54154211A JP6291778A JP6291778A JPS54154211A JP S54154211 A JPS54154211 A JP S54154211A JP 6291778 A JP6291778 A JP 6291778A JP 6291778 A JP6291778 A JP 6291778A JP S54154211 A JPS54154211 A JP S54154211A
Authority
JP
Japan
Prior art keywords
oscillator
frequency
output
beat
oscillating
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
JP6291778A
Other languages
Japanese (ja)
Inventor
Takeo Suzuki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6291778A priority Critical patent/JPS54154211A/en
Publication of JPS54154211A publication Critical patent/JPS54154211A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
    • H03L7/185—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number using a mixer in the loop

Landscapes

  • Transceivers (AREA)
  • Superheterodyne Receivers (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To obtain the high-accuracy oscillation frequency by oscillating the double frequency of the high frequency band required for the transmission and reception by means of the variable divider and the local oscillator for beat-down use. CONSTITUTION:The output of oscillator 1 is set to phase comparator 3 after division 2, and the output of voltage control oscillator 5 is compared with the signal underwent frequency conversion 7 and variable division 4. Then the output is applied to oscillator 5 via loop filter 6. Thus, the PLL circuit is constituted, oscillating the double frequency of the high frequency band required for the transmission and reception via divider 4 and local oscillator LO for beat-down use. In such way, the high-accuracy oscillation frequency can be obtained.
JP6291778A 1978-05-26 1978-05-26 Local oscillation circuit Pending JPS54154211A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6291778A JPS54154211A (en) 1978-05-26 1978-05-26 Local oscillation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6291778A JPS54154211A (en) 1978-05-26 1978-05-26 Local oscillation circuit

Publications (1)

Publication Number Publication Date
JPS54154211A true JPS54154211A (en) 1979-12-05

Family

ID=13214075

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6291778A Pending JPS54154211A (en) 1978-05-26 1978-05-26 Local oscillation circuit

Country Status (1)

Country Link
JP (1) JPS54154211A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4449250A (en) * 1981-12-21 1984-05-15 Motorola, Inc. Radio-frequency synthesizer for duplex radios
EP0369660A2 (en) * 1988-11-16 1990-05-23 Raytheon Company Microwave frequency synthesizer with a frequency offset generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4449250A (en) * 1981-12-21 1984-05-15 Motorola, Inc. Radio-frequency synthesizer for duplex radios
EP0369660A2 (en) * 1988-11-16 1990-05-23 Raytheon Company Microwave frequency synthesizer with a frequency offset generator

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