JPS56117429A - Phase lock loop - Google Patents

Phase lock loop

Info

Publication number
JPS56117429A
JPS56117429A JP2091180A JP2091180A JPS56117429A JP S56117429 A JPS56117429 A JP S56117429A JP 2091180 A JP2091180 A JP 2091180A JP 2091180 A JP2091180 A JP 2091180A JP S56117429 A JPS56117429 A JP S56117429A
Authority
JP
Japan
Prior art keywords
frequency
musical tone
band pass
pass characteristics
phase comparator
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
JP2091180A
Other languages
Japanese (ja)
Inventor
Kyozo Oota
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.)
Keio Giken Kogyo KK
Original Assignee
Keio Giken Kogyo KK
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 Keio Giken Kogyo KK filed Critical Keio Giken Kogyo KK
Priority to JP2091180A priority Critical patent/JPS56117429A/en
Publication of JPS56117429A publication Critical patent/JPS56117429A/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
    • H03L7/08—Details of the phase-locked loop
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop

Abstract

PURPOSE:To obtain an even lead-in range to each input frequency, by varying the band pass characteristics synchronously with the composite signal for a low-pass filter provided at the output side of a phase comparator. CONSTITUTION:The free-running frequency of the voltage control oscillator 3 is set to be the standard frequency of a musical tone. Then the standard frequency is compared with the frequency of the musical tone through the phase comparator 1. The output of comparison is applied to the oscillator 3 via the low-pass filter 2, and the oscillation frequency is led into the frequency of the musical tone. The means 9 is provided to vary the band pass characteristics within the filter 2, and the band pass characteristics is varied according to the frequency component. As a result, an even lead-in range can be obtained for the frequencies from the basic wave to a higher-order harmonic wave.
JP2091180A 1980-02-20 1980-02-20 Phase lock loop Pending JPS56117429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2091180A JPS56117429A (en) 1980-02-20 1980-02-20 Phase lock loop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2091180A JPS56117429A (en) 1980-02-20 1980-02-20 Phase lock loop

Publications (1)

Publication Number Publication Date
JPS56117429A true JPS56117429A (en) 1981-09-14

Family

ID=12040398

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2091180A Pending JPS56117429A (en) 1980-02-20 1980-02-20 Phase lock loop

Country Status (1)

Country Link
JP (1) JPS56117429A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5930308A (en) * 1982-08-13 1984-02-17 Yokogawa Hewlett Packard Ltd Phase/amplitude converter
US4479091A (en) * 1980-12-03 1984-10-23 Alps Electric Co., Ltd. Phase locked loop FM demodulator with variable bandwidth loop filter
US5589795A (en) * 1993-12-23 1996-12-31 Nokia Mobile Phones Ltd. Method and arrangement for controlling a loop filter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4479091A (en) * 1980-12-03 1984-10-23 Alps Electric Co., Ltd. Phase locked loop FM demodulator with variable bandwidth loop filter
JPS5930308A (en) * 1982-08-13 1984-02-17 Yokogawa Hewlett Packard Ltd Phase/amplitude converter
JPH0548003B2 (en) * 1982-08-13 1993-07-20 Hewlett Packard Yokogawa
US5589795A (en) * 1993-12-23 1996-12-31 Nokia Mobile Phones Ltd. Method and arrangement for controlling a loop filter

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