OSCILLATION CIRCUIT

PROBLEM TO BE SOLVED: To solve a problem of a conventional oscillation circuit that the manufacturing cost is increased resulting from increased number of components because increased number of oscillated frequencies in the oscillation circuit oscillating a plurality of frequencies requires many mor...

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Bibliographische Detailangaben
Hauptverfasser:	YATSUDA HIROMI, TAKAHASHI HIDENORI, SAKAMOTO HIROTOKU
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY ELECTRICITY GENERATION OF NOISE BY SUCH CIRCUITS GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS RESONATORS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To solve a problem of a conventional oscillation circuit that the manufacturing cost is increased resulting from increased number of components because increased number of oscillated frequencies in the oscillation circuit oscillating a plurality of frequencies requires many more switches. SOLUTION: SAW filters 6, 8 of a feedback circuit 4 in the oscillation circuit 100 provide outputs of signals with different phases with respect to received signals. One SAW filter in the SAW filters 6, 8 which satisfies the oscillating condition with respect to the phase is used for the oscillation and a phase shifter 10 selects the active SAW filter. Thus, no changeover switch to select the SAW filter is required, the number of components is decreased so that the inexpensive oscillation circuit can be realized.