OSCILLATION CIRCUIT, AND SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE AND ROTATION ANGLE DETECTION DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an oscillation circuit that ensures oscillation frequency accuracy against parameter fluctuations such as temperature fluctuations even in a relatively high frequency band.SOLUTION: The oscillation circuit includes a first capacitor whose terminal voltage linearly changes in a first direction when it is driven for charge by a current, and a second capacitor whose terminal voltage linearly changes in a second direction opposite to the first direction when it is driven for discharge by a current as the first capacitor is driven for charge. The oscillation circuit is configured to form an oscillation period on the basis of a first timing when the terminal voltages of the first and second capacitors intersect.