公开(公告)号：US20150207462A1

公开(公告)日：2015-07-23

申请号：US14158231

申请日：2014-01-17

Applicant: Apple Inc.

Inventor： Ajay Kumar Bhatia ,  Amrinder S. Barn

IPC: H03F1/02 ,  H03F3/45

CPC classification number: G11C7/1051 ,  G11C7/02 ,  G11C7/065 ,  G11C7/08 ,  G11C7/1048

Abstract: A device for comparing voltage levels of a pair of input signals is presented. The device may include a pre-amp circuit and a differential amplifier. The pre-amp circuit may be configured to receive a first input signal and a second input signal, adjust a voltage level of each of the pair of input signals, and assert a control signal after a pre-determined period of time from the assertion of an enable signal. The differential amplifier may be configured to amplify a voltage difference between the first input signal and the second input signal dependent upon the adjusted voltage level of the pair of input signals in response to the assertion of the control signal.

Abstract translation: 提出了一种用于比较一对输入信号的电压电平的装置。 该器件可以包括前置放大器电路和差分放大器。 前置放大器电路可以被配置为接收第一输入信号和第二输入信号，调整该对输入信号中的每一个的电压电平，并且在从所述输入信号的断言之后的预定时间段之后断言控制信号 一个使能信号。 差分放大器可以被配置为响应于控制信号的断言，放大第一输入信号和第二输入信号之间的电压差，这取决于一对输入信号的调整的电压电平。