| 摘要 |
PROBLEM TO BE SOLVED: To obtain a signal processor without dispersion in a frequency characteristic of an amplifier or the like due to a capacitance change by providing a signal processing means processing an input signal and a substrate capacitance detection means controlling the frequency characteristic of the signal processing means in response to a detected capacitance. SOLUTION: A substrate capacitance detection circuit 4 provides an output of a high control voltage Vc when the detected capacitance is small and provides an output of a low control voltage Vc when the detected capacitance is high. When the frequency characteristic of the amplifier 5 is changed due to the effect of the substrate capacitance, a variable equalizer 6 receives the control voltage Vc to correct a change in the frequency characteristic thereby obtaining the frequency characteristic suitable for the processing of a post-stage signal processing circuit 7. Thus, the signal processor without dispersion in the amplifier frequency characteristic due to a capacitance change is obtained. |
