公开(公告)号：US20150280649A1

公开(公告)日：2015-10-01

申请号：US14692293

申请日：2015-04-21

Applicant: Stryker Combo L.L.C.

Inventor： Regis J Nero, JR. ,  Jeffrey A Gibala

IPC: H03F1/02 ,  H03F3/19 ,  H03F3/217

CPC classification number: H03F1/0227 ,  H02M2001/0045 ,  H03C1/02 ,  H03F1/02 ,  H03F3/19 ,  H03F3/217 ,  H03F3/2176 ,  H03F3/245 ,  H03F2200/324 ,  H03F2200/451

Abstract: Systems and methods are provided for generating an amplitude modulation signal to a switchmode power amplifier. A DC to DC switch is configured to receive a DC input voltage and to provide a DC output voltage. A low dropout regulator is configured to provide the amplitude modulation signal according to a modulation control signal received by the low dropout regulator. A control circuit is configured to establish a nominal operating power level for the power amplifier via the amplitude modulation signal and to maintain a minimum voltage difference between the DC output voltage and the low dropout regulator output. A modulator control circuit is configured to provide the modulation control signal to the low dropout regulator. The modulator control circuit provides the transition from a high amplitude to a low amplitude and a transition from the low amplitude to the high amplitude at configurable first and second slopes, respectively.

Abstract translation: 系统和方法被提供用于产生到开关模式功率放大器的幅度调制信号。 直流 - 直流开关配置为接收直流输入电压并提供直流输出电压。 低压差稳压器被配置为根据由低压差调节器接收的调制控制信号来提供幅度调制信号。 控制电路被配置为通过幅度调制信号建立功率放大器的额定工作功率电平，并且保持DC输出电压和低压差稳压器输出之间的最小电压差。 调制器控制电路被配置为向低压差调节器提供调制控制信号。 调制器控制电路分别提供从高幅度到低幅度的转变以及在可配置的第一和第二斜率处从低幅度到高幅度的转变。