MY111359A - An apparatus for detecting frequency of an input signal - Google Patents
An apparatus for detecting frequency of an input signalInfo
- Publication number
- MY111359A MY111359A MYUI93001757A MYUI19931757A MY111359A MY 111359 A MY111359 A MY 111359A MY UI93001757 A MYUI93001757 A MY UI93001757A MY UI19931757 A MYUI19931757 A MY UI19931757A MY 111359 A MY111359 A MY 111359A
- Authority
- MY
- Malaysia
- Prior art keywords
- input signal
- pulses
- signal
- frequency
- reference signal
- Prior art date
Links
Landscapes
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
AN APPARATUS FOR DETECTING FREQUENCY OF AN INPUT SIGNAL BY COUNTING THE PULSES OF A REFERENCE SIGNAL WITH A PREDETERMINED FREQUENCY WITHIN ONE CYCLE OF THE INPUT SIGNAL IS DISCLOSED. THE APPARATUS INCLUDES A FIRST AND A SECOND LATCH FOR LATCHING THE NUMBER OF PULSES OF THE REFERENCE SIGNAL FOR TWO CONSECUTIVE PERIODS OF THE INPUT SIGNAL. IN RESPONSE TO THE REFERENCE SIGNAL, A COMPARATOR IS USED TO COMPARE THE OUTPUT VALUE OF THE FIRST AND THE SECOND LATCH. WHEN THEY ARE DIFFERENT, A FLIP - FLOP GENERATES AN INTERRUPT SIGNAL TO A MICROPROCESSOR. THE MICROPROCESSOR READS THE UPDATE NUMBER OF PULSES AND GENERATES AN UPDATE FREQUENCY VALUE BASED NUMBER OF PULSES AND THE PREDETERMINED FREQUENCY OF THE REFERANCE SIGNAL. @@@(FIG. 1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MYUI93001757A MY111359A (en) | 1993-09-01 | 1993-09-01 | An apparatus for detecting frequency of an input signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MYUI93001757A MY111359A (en) | 1993-09-01 | 1993-09-01 | An apparatus for detecting frequency of an input signal |
Publications (1)
Publication Number | Publication Date |
---|---|
MY111359A true MY111359A (en) | 1999-11-30 |
Family
ID=81607406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MYUI93001757A MY111359A (en) | 1993-09-01 | 1993-09-01 | An apparatus for detecting frequency of an input signal |
Country Status (1)
Country | Link |
---|---|
MY (1) | MY111359A (en) |
-
1993
- 1993-09-01 MY MYUI93001757A patent/MY111359A/en unknown
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