公开(公告)号：US20100123508A1

公开(公告)日：2010-05-20

申请号：US12578572

申请日：2009-10-13

Applicant: Gang Zha ,  Guenter Neidhardt ,  Peter Kirchlechner

Inventor： Gang Zha ,  Guenter Neidhardt ,  Peter Kirchlechner

IPC: H03K17/00

CPC classification number: H03K17/005 ,  H03K17/16

Abstract: A first switching circuit has an input for receiving a first input signal, and a second switching circuit has an input for receiving a second input signal. A node is connected to receive outputs from both the first and second switching circuits. A filter receives an unfiltered signal from the node to generate an output signal. A circuit is provided to alternately actuate the first and second switching circuits during a transition time period so as to smoothly transition the output of the filter between the first and second input signals. At least one of the first and second input signals is a time-varying analog signal. The smooth transition between the first and second input signals has a shape determined by pulse width and frequency characteristics of pulses output by the circuit to alternately actuate the first and second switching circuits. The shape may include a linear ramp, an S-shaped curve, a parabolic curve and a hyperbolic curve.

Abstract translation: 第一开关电路具有用于接收第一输入信号的输入端，第二开关电路具有用于接收第二输入信号的输入端。 连接节点以接收来自第一和第二开关电路的输出。 滤波器从节点接收未滤波的信号以产生输出信号。 提供电路以在转变时间周期期间交替地致动第一和第二开关电路，以便在第一和第二输入信号之间平滑地转换滤波器的输出。 第一和第二输入信号中的至少一个是时变模拟信号。 第一和第二输入信号之间的平滑过渡具有由电路输出的脉冲的脉冲宽度和频率特性确定的形状，以交替地致动第一和第二开关电路。 该形状可以包括线性斜坡，S形曲线，抛物线曲线和双曲线。