公开(公告)号：US20130162307A1

公开(公告)日：2013-06-27

申请号：US13692636

申请日：2012-12-03

Applicant: Cirrus Logic, Inc.

Inventor： Anindya Bhattacharya ,  John Melanson

IPC: H03K5/12

CPC classification number: B41J2/04541 ,  B41J2/04548 ,  B41J2/0455 ,  B41J2/04581 ,  H03K4/063 ,  H03K5/12

Abstract: A capacitive load drive circuit may comprise a high current drive amplifier configured to be coupled to a capacitive load during a high current ramp up of the voltage across the capacitive load to a cut off voltage; a low current drive amplifier configured to be connected to the capacitive load during a low current ramp up of the voltage across the capacitive load, from the cut off voltage to a maximum voltage across the capacitive load; and the high current drive amplifier configured to be connected to the capacitive load during a high current ramp down of the voltage across the capacitive load. The low current drive amplifier may be connected to the capacitive load during a period of steady state of the voltage across the capacitive load, intermediate the low current ramp up and the high current ramp down.

Abstract translation: 容性负载驱动电路可以包括高电流驱动放大器，其被配置为在跨过容性负载的电压的高电流斜坡上升到截止电压时耦合到电容性负载; 低电流驱动放大器被配置为在跨过容性负载的电压的低电流斜升期间从截止电压到跨过容性负载的最大电压连接到电容性负载; 以及高电流驱动放大器，被配置为在跨过容性负载的电压的高电流斜降期间连接到电容性负载。 在电容负载两端的电压稳定期间，低电流驱动放大器可以连接到电容性负载，低电平斜坡上升和高电流斜坡下降。

公开(公告)号：US09150010B1

公开(公告)日：2015-10-06

申请号：US14071346

申请日：2013-11-04

Applicant: CIRRUS LOGIC, INC.

Inventor： Anindya Bhattacharya ,  John Melanson

IPC: H03K5/12 ,  B41J2/045 ,  H03K4/06

CPC classification number: B41J2/04541 ,  B41J2/04548 ,  B41J2/0455 ,  B41J2/04581 ,  H03K4/063 ,  H03K5/12

Abstract: A system and method for charging heavy capacitive loads may comprise an n-stage stacked charging circuit wherein n is an integer greater than or equal to 2 and wherein the n-stage stacked charging circuit may comprise n−1 capacitors and a voltage supply, each sequentially electrically connected to the capacitive load in an order through a respective first through nth switch during a respective first through nth charging time period; the n−1th capacitors each sequentially electrically connected to the capacitive load in reverse order during a first through n−1th discharging time period through the respective n−1th through first switches. The system and method may comprise an n+1th switch electrically connecting the capacitive load to ground during an nth discharging period. The capacitive load may comprise a piezoelectric element, which may comprise an inkjet printer head inkjet actuator.

Abstract translation: 用于对重电容性负载进行充电的系统和方法可以包括n级堆叠充电电路，其中n是大于或等于2的整数，并且其中n级堆叠充电电路可以包括n-1个电容器和电压源 在相应的第一至第n充电时间段期间，通过相应的第一至第N开关按顺序电连接到电容性负载; 在第一到第n-1放电时间段期间，第n-1个电容器通过相应的第n-1个至第一开关以相反顺序电连接到电容性负载。 该系统和方法可以包括在第n个放电周期期间将电容性负载电连接到地的第n + 1开关。 电容性负载可以包括压电元件，其可以包括喷墨打印头喷墨致动器。

公开(公告)号：US08717071B2

公开(公告)日：2014-05-06

申请号：US13692636

申请日：2012-12-03

Applicant: Cirrus Logic, Inc.

Inventor： Anindya Bhattacharya ,  John Melanson

IPC: H03K4/02 ,  B41J29/38

CPC classification number: B41J2/04541 ,  B41J2/04548 ,  B41J2/0455 ,  B41J2/04581 ,  H03K4/063 ,  H03K5/12

Abstract: A capacitive load drive circuit may comprise a high current drive amplifier configured to be coupled to a capacitive load during a high current ramp up of the voltage across the capacitive load to a cut off voltage; a low current drive amplifier configured to be connected to the capacitive load during a low current ramp up of the voltage across the capacitive load, from the cut off voltage to a maximum voltage across the capacitive load; and the high current drive amplifier configured to be connected to the capacitive load during a high current ramp down of the voltage across the capacitive load. The low current drive amplifier may be connected to the capacitive load during a period of steady state of the voltage across the capacitive load, intermediate the low current ramp up and the high current ramp down.

Abstract translation: 容性负载驱动电路可以包括高电流驱动放大器，其被配置为在跨过容性负载的电压的高电流斜坡上升到截止电压时耦合到电容性负载; 低电流驱动放大器被配置为在跨过容性负载的电压的低电流斜升期间从截止电压到跨过容性负载的最大电压连接到电容性负载; 以及高电流驱动放大器，被配置为在跨过容性负载的电压的高电流斜降期间连接到电容性负载。 在电容负载两端的电压稳定期间，低电流驱动放大器可以连接到电容性负载，低电平斜坡上升和高电流斜坡下降。