JPS5531919A - Frequency comparator - Google Patents
Frequency comparatorInfo
- Publication number
- JPS5531919A JPS5531919A JP10484078A JP10484078A JPS5531919A JP S5531919 A JPS5531919 A JP S5531919A JP 10484078 A JP10484078 A JP 10484078A JP 10484078 A JP10484078 A JP 10484078A JP S5531919 A JPS5531919 A JP S5531919A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- level
- output
- signal
- terminal
- 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
- Manipulation Of Pulses (AREA)
Abstract
PURPOSE: To enable to arbitrarily select the hystersis characteristics at frequency comparing point, by providing the gate circuit making the sampled pulse signal to non-delivery state at the upper and lower limit value of the hysteresis characteristics of the digital frequency comparator.
CONSTITUTION: When the signal a is inputted to the input gate circuit 2 from the terminal 1 and the signal (b) in H level is inputted from the reset terminal 8 to the FF circuit 5, L level is outputted (f) at the output Q of the circuit 5, i.e., at the comparator output terminal 10. When the output of the NOR gate 4 is at L level (c), the signal at the terminal 1 is delivered to the input section O of the binary counter circuit 3. This causes the output of the circuit 3 at L level, and H level signal is outputted from the circuit 4 to block (d) the signal to the input section of the circuit 3. In this case, the output Q of the circuit 5 is at L and the anti-Q is at H level, and they are inputted to the preset input set circuit 6. The number of counts of the circuit 3 until the output of the circuit 4 is at H level after the preset of the circuit 3 is made, is dependent on the output anti-Q level, and the difference is the width of the hysteresis.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10484078A JPS5531919A (en) | 1978-08-30 | 1978-08-30 | Frequency comparator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10484078A JPS5531919A (en) | 1978-08-30 | 1978-08-30 | Frequency comparator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5531919A true JPS5531919A (en) | 1980-03-06 |
Family
ID=14391536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10484078A Pending JPS5531919A (en) | 1978-08-30 | 1978-08-30 | Frequency comparator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5531919A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55104767A (en) * | 1979-02-07 | 1980-08-11 | Tokai Rika Co Ltd | Digital hysteresis circuit |
| JPH063386A (en) * | 1992-06-23 | 1994-01-11 | Mitsubishi Electric Corp | Frequency detection circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS536080A (en) * | 1976-07-06 | 1978-01-20 | Sony Corp | Frequency detection circuit |
| JPS5316475B2 (en) * | 1972-09-08 | 1978-06-01 |
-
1978
- 1978-08-30 JP JP10484078A patent/JPS5531919A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5316475B2 (en) * | 1972-09-08 | 1978-06-01 | ||
| JPS536080A (en) * | 1976-07-06 | 1978-01-20 | Sony Corp | Frequency detection circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55104767A (en) * | 1979-02-07 | 1980-08-11 | Tokai Rika Co Ltd | Digital hysteresis circuit |
| JPS6321144B2 (en) * | 1979-02-07 | 1988-05-02 | Tokai Rika Co Ltd | |
| JPH063386A (en) * | 1992-06-23 | 1994-01-11 | Mitsubishi Electric Corp | Frequency detection circuit |
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