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 unitInfo
- 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
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
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)
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 |
-
1978
- 1978-07-14 JP JP8522678A patent/JPS5513826A/en active Pending
Cited By (2)
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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