公开(公告)号：US20130321190A1

公开(公告)日：2013-12-05

申请号：US13902638

申请日：2013-05-24

Applicant: Wolfson Microelectronics pic

Inventor： John Paul Lesso ,  John Laurence Pennock

IPC: H03M1/34

CPC classification number: H03M1/00 ,  H03M1/1014 ,  H03M1/12 ,  H03M1/1225 ,  H03M1/186 ,  H03M1/34 ,  H03M1/60 ,  H03M2201/4233

Abstract: An apparatus and method for regulating analogue-to-digital converters. First and second input signals are received at controlled oscillator circuitry which generates respective first and second pulse streams with pulse rates based on the relevant input signal. Difference circuitry determines the difference in number of pulses of the first and second pulse streams and outputs a first digital signal. Circuitry also determines a signal independent value based on the number of pulses of the first and/or second pulse streams. In one embodiment this value is the sum or average of the number of pulses of the first and second pulse streams. This value can be used to calibrate for any variation in transfer characteristic of the oscillator circuitry. In one embodiment this value is compared to a reference value and a regulation signal passed to control circuitry to regulate the operation of the oscillation circuitry.

Abstract translation: 一种用于调节模数转换器的装置和方法。 在受控振荡器电路处接收第一和第二输入信号，该电路产生具有基于相关输入信号的脉冲速率的相应的第一和第二脉冲流。 差分电路确定第一和第二脉冲流的脉冲数的差异并输出第一数字信号。 电路还基于第一和/或第二脉冲流的脉冲数来确定与信号无关的值。 在一个实施例中，该值是第一和第二脉冲流的脉冲数的和或平均值。 该值可用于校准振荡器电路的传输特性的任何变化。 在一个实施例中，该值与参考值和传递给控制电路的调节信号进行比较以调节振荡电路的操作。