Patent ID: 9654099
Date: 2017-05-16
CPC Classifications: B41J,H03K

Claim:
1. A driving circuit for driving a capacitive load comprising: a modulation circuit that generates a modulation signal that is obtained by pulse-modulating a source signal; a transistor that generates an amplified modulation signal by amplifying the modulation signal; a low pass filter that generates a drive signal which is applied to the capacitive load by smoothening the amplified modulation signal; and a circuit substrate on which the modulation circuit, the transistor, and the low pass filter are mounted, wherein the transistor includes, a first electrode, a second electrode, and a third electrode, wherein the circuit substrate has a first land corresponding to the first electrode, a second land corresponding to the second electrode, and a third land corresponding to the third electrode, wherein the circuit substrate includes a plurality of substrate layers and a plurality of wiring patterns, wherein each of the plurality of wiring patterns is connected to each of the plurality of substrate layers, wherein the plurality of wiring patterns includes a first wiring pattern, a second wiring pattern, and a third wiring pattern, wherein the first wiring pattern is connected to the first land, the second wiring pattern is connected to the second land, and the third wiring pattern is connected to the third land, and wherein each of the first land, the second land, and the third land is connected to each of the plurality of substrate layers by way of respective wiring pattern.