| 摘要 |
A charge and discharge signal circuit includes: high side transistors connected in series; low side transistors connected in series; high side drive circuits; low side drive circuits; and a drive signal generation circuit, wherein each drive circuit includes: a level shifter; a capacitor switch string connected in series, being connected in parallel with the transistor; and a drive part, to which an output of the level shifter is supplied, at least one pair of neighboring ones of the level shifters are commonly formed, and two neighboring ones of the drive parts receive a same output from the common shifters. |
| 主权项 |
1. A charge and discharge signal circuit comprising:
a plurality of high side transistors connected in series between a high potential side power source and an output node; a plurality of low side transistors connected in series between a low potential side power source and the output node; a plurality of high side drive circuits provided respectively in correspondence to the plurality of high side transistors; a plurality of low side drive circuits provided respectively in correspondence to the plurality of low side transistors; and a drive signal generation circuit configured to output a drive signal, wherein each of the high side drive circuits includes:
a high side level shifter configured to convert a level of the drive signal;a high side capacitor switch string of a capacitor and a switch element connected in series, being connected in parallel with the high side transistor; anda high side drive part connected between a source of the high side transistor and a connection node of the capacitor and the switch element of the high side capacitor switch string, to which an output of the high side level shifter is supplied, and which outputs a drive signal to the high side transistor, and each of the low side drive circuits includes:
a low side level shifter configured to convert a level of the drive signal;a low side capacitor switch string of a capacitor and a switch element connected in series, being connected in parallel with the low side transistor; anda low side drive part connected between a source of the low side transistor and a connection node of the capacitor and the switch element of the low side capacitor switch string, to which an output of the low side level shifter is supplied, and which outputs a drive signal to the low side transistor, and at least one pair of neighboring ones of the high side level shifters or at least one pair of neighboring ones of the low side level shifters are commonly formed, and two neighboring ones of the high side drive parts or two neighboring ones of the low side drive parts receive a same output from the common high side level shifters or the common low side level shifters. |
