| 摘要 |
PROBLEM TO BE SOLVED: To provide a crystal oscillation circuit capable of greatly improving variation in various characteristics such as current consumption and negative resistance, due to a temperature variation in threshold voltage VT of an oscillation circuit comprising a CMOS inverter. SOLUTION: An output portion of a power circuit 31 with temperature characteristics is connected to a source voltage of a CMOS inverter type crystal oscillation circuit 4 including a crystal vibrator, and the power circuit 31 with temperature characteristics comprises an amplifier 2, a diode 20, and a resistance 11, and an output end V2 of the amplifier 2 is connected to the anode of a diode 20, whose cathode side is connected to a negative input end V3 of the amplifier 2 and one end of the resistance, the other end of which is grounded while a positive input end V1 of the amplifier 2 is connected to a voltage source 1 having small VCC variation. COPYRIGHT: (C)2008,JPO&INPIT
|
