FREQUENCY DETECTING CIRCUIT

PURPOSE:To reduce the size of a chip, by substituting two flip-flops for the fourth counter in a frequency detecting circuit. CONSTITUTION:Instead of the fourth counter C4, a flip-flop 9 (FF4) and 10 (DF5) for operating the third counter C3 two times and an NOR circuit 11 are provided. When an outpu...

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Bibliographische Detailangaben
1. Verfasser:	SHIBATA NOBUHO
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT MEASURING MEASURING ELECTRIC VARIABLES MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK MEASURING MAGNETIC VARIABLES PHYSICS PULSE TECHNIQUE TESTING
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Beschreibung
Zusammenfassung:	PURPOSE:To reduce the size of a chip, by substituting two flip-flops for the fourth counter in a frequency detecting circuit. CONSTITUTION:Instead of the fourth counter C4, a flip-flop 9 (FF4) and 10 (DF5) for operating the third counter C3 two times and an NOR circuit 11 are provided. When an output Q2 of the counter C2 falls, the FF4 is set and the DF5 is reset. The NOR circuit 11 which is in ''H'' before that time becomes ''L'', and starts the first counting. Subsequently, after a prescribed time, the counting ends, the DF5 becomes ''H'' by an output Q3, and the counter C3 starts the second counting. Subsequently, in the same way, the counting ends, the output of the NOR circuit 11 becomes ''H'', and the counter C3 stops its operation. In this way, the number of internal elements is reduced, and the size of a chip can be made small.