| 摘要 |
PROBLEM TO BE SOLVED: To provide an oscillation circuit and an oscillator which can reduce negative resistance necessary for oscillation and power consumption of the circuit. SOLUTION: An oscillation circuit 10 comprises a cross couple-type circuit wherein a transistor M1 and a transistor M2 are connected differentially, and oscillates in a resonance point band of a vibrator SAW. The transistor M1 is connected to a resistor RL1 as a first source load circuit and the transistor M2 is connected to a resistor RL2 as a second source load circuit. Also the transistor M1 is connected to a resistor Rs1 as a first drain load circuit and the transistor M2 is connected to a resistor Rs2 as a second drain load circuit. The capacity of an impedance of the first source load circuit is the same or larger than that of a first drain load circuit, and the capacity of an impedance of the second source load circuit is the same or larger than that of the second drain load circuit. COPYRIGHT: (C)2009,JPO&INPIT
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