Patent ID: 7482882
Filing Date: 2009-01-27
Classification: H03B,H03H

Abstract:
1. A voltage control oscillation circuit comprising: a low-pass filter and/or a high-pass filter, each of which is preset to have an actual gain which is intended to be identical to a preset target gain at a reference frequency in an attenuating band according to a frequency-gain characteristic in response to an input signal having the reference frequency; and an element that has a same structure as an element that composes the low-pass filter and/or the high-pass filter and specifies an oscillation frequency; wherein an element parameter of the element that specifies the oscillation frequency is adjusted in correspondence to a differential between the actual gain of the low-pass filter and that of the high-pass filter, or to a differential between either of respective gains of the low-pass/high-pass filters and the target gain at the reference frequency.