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发明公开
CN105406869A 模拟频率转换电路、库伦计算器以及库伦计算方法 有权

模拟频率转换电路、库伦计算器以及库伦计算方法
摘要：
本发明公开了一种模拟频率转换电路、库仑计算器及库仑计算方法。模拟频率转换电路包括开关组、积分比较电路、补偿电路和控制电路。开关组接收指示电流的第一感应信号，并且在切换信号的控制下提供交替地等于第一感应信号的同相值和反相值的第二感应信号。积分比较电路对第二感应信号进行积分以产生积分值，并产生频率指示电流的触发信号串，触发信号串中的每个信号是在积分值到达预设参考值时产生的。每当触发信号串中的信号产生时，补偿电路补偿积分值一个预定值。控制电路产生切换信号，并且使其中第二感应信号等于同相值的时间间隔和其中第二感应信号等于反相值的时间间隔相等。本发明可以减小因积分比较电路的输入失调所引起的误差。
摘要（英）：

In an analog-to-frequency converting circuit, a set of switches receive a first sense signal indicative of a current and provides a second sense signal that alternates between an original version of the first sense signal and a reversed version of the first sense signal, under control of a switching signal. An integral comparing circuit integrates the second sense signal to generate an integral value and generates a train of trigger signals. Each trigger signal is generated when the integral value reaches a preset reference. A compensation circuit compensates for the integral value with a predetermined value in response to each trigger signal. A control circuit generates the switching signal such that a time interval during which the second sense signal is the original version and a time interval during which the second sense signal is the reversed version are substantially the same.

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