LOCAL OSCILLATION CIRCUIT AND RECEPTION CIRCUIT INCLUDING THE CIRCUIT

摘要

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.