LOCAL OSCILLATION CIRCUIT AND RECEPTION CIRCUIT INCLUDING THE CIRCUIT

PROBLEM TO BE SOLVED: To provide a reception circuit where the number of components of the local oscillation circuit is reduced to attain a one-chip configuration, the current consumption is reduced and the input sensitivity is made independent of power supply voltage. SOLUTION: In a local oscillati...

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Hauptverfasser:	NIRAZUKA KIMITOSHI, GOTO KUNIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER ELECTRIC COMMUNICATION TECHNIQUE 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 TRANSMISSION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a reception circuit where the number of components of the local oscillation circuit is reduced to attain a one-chip configuration, the current consumption is reduced and the input sensitivity is made independent of power supply voltage. SOLUTION: In a local oscillation circuit 87a and the reception circuit including the local oscillation circuit 87a, the local oscillation circuit 87a is provided with a crystal oscillation circuit section 10 that generates an output voltage with a fixed frequency and also with an interface section 20 that uses a signal obtained by converting the output voltage 11 of the crystal oscillation circuit section 10 into a current for a local oscillation signal that is to be mixed with a reception signal from an antenna 81.