JPS5513826A - Measuring circuit for harmonic frequency of degree n of automatic tuning unit - Google Patents

Measuring circuit for harmonic frequency of degree n of automatic tuning unit

Info

Publication number
JPS5513826A
JPS5513826A JP8522678A JP8522678A JPS5513826A JP S5513826 A JPS5513826 A JP S5513826A JP 8522678 A JP8522678 A JP 8522678A JP 8522678 A JP8522678 A JP 8522678A JP S5513826 A JPS5513826 A JP S5513826A
Authority
JP
Japan
Prior art keywords
frequency
degree
signal
output
string
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
JP8522678A
Other languages
Japanese (ja)
Inventor
Minoru Shimauchi
Takashi Onoda
Kenichi Moriya
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki 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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Priority to JP8522678A priority Critical patent/JPS5513826A/en
Publication of JPS5513826A publication Critical patent/JPS5513826A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: To extract a frequency signal of degree N from a filter and then to measure it by measuring and setting the frequency of an untuned string to reference value (f1), by multiplying reference value (f1) by numeral N indicating the degree of the frequency of degree N, and by controlling filter characteristics on the basis of Nf1.
CONSTITUTION: String frequency extraction circuit 1 picks up the string frequency and then output signal (f) of a frequency corresponding to the frequency of the string. Then, VCF2 allows only frequency signal (fN) of degree N of a frequency corresponding to filter characteristic control signal CN to pass through. After converting signal (fN) into a digital signal of a corresponding frequency, divider circuit 3 divides it to output digital division signal DFN of degree N. Counter 4 counts the divided-wave signal by clock pulses to output frequency data (fd) of degree N. Then, N-degree frequency signal extraction control circuit 5 converts the data into an analog signal by multiplying data (fd) by numeral N indicating the degree to output above-mentioned filter control signal CN. Output circuit 6 outputs (fd) from counter 4 as the N-degree harmonic measurement frequency data after a certain time elapses since division signal DFD from divider circuit 3 is outputted.
COPYRIGHT: (C)1980,JPO&Japio
JP8522678A 1978-07-14 1978-07-14 Measuring circuit for harmonic frequency of degree n of automatic tuning unit Pending JPS5513826A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8522678A JPS5513826A (en) 1978-07-14 1978-07-14 Measuring circuit for harmonic frequency of degree n of automatic tuning unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8522678A JPS5513826A (en) 1978-07-14 1978-07-14 Measuring circuit for harmonic frequency of degree n of automatic tuning unit

Publications (1)

Publication Number Publication Date
JPS5513826A true JPS5513826A (en) 1980-01-31

Family

ID=13852641

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8522678A Pending JPS5513826A (en) 1978-07-14 1978-07-14 Measuring circuit for harmonic frequency of degree n of automatic tuning unit

Country Status (1)

Country Link
JP (1) JPS5513826A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61162236A (en) * 1985-01-10 1986-07-22 Musashi Seimitsu Kogyo Kk Closed forging die device
US5577406A (en) * 1993-04-06 1996-11-26 Danfoss A/S Forming tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61162236A (en) * 1985-01-10 1986-07-22 Musashi Seimitsu Kogyo Kk Closed forging die device
US5577406A (en) * 1993-04-06 1996-11-26 Danfoss A/S Forming tool

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