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发明授权
CN104954019B 管线式模数转换器及其乘法数模转换器 有权

管线式模数转换器及其乘法数模转换器
摘要：
本发明公开一种管线式模数转换器及其乘法数模转换器。所述乘法数模转换器包括运算放大器以及共享运算放大器的第一开关电容器网络及第二开关电容器网络，当第一开关电容器网络耦接到运算放大器时，运算放大器与第一电容式负载单元耦接，且当第一开关电容器网络从运算放大器断开时，第一电容式负载单元复位；当第二开关电容器网络耦接到运算放大器时，运算放大器与第二电容式负载单元耦接，且当第二开关电容器网络从运算放大器断开时，第二电容式负载单元复位。本发明能够有效地缩短管线式模数转换器的稳定时间。
摘要（英）：

A multiplying digital-to-analog converter (MDAC) with capacitive load reset on an operational amplifier and a pipeline analog-to-digital converter using the MDAC are disclosed. The MDAC includes an operational amplifier and first and second switched-capacitor networks sharing the operational amplifier. The operational amplifier is further coupled with first capacitive load cells when the first switched-capacitor network is coupled to the operational amplifier, and the first capacitive load cells are reset when the first switched-capacitor network is disconnected from the operational amplifier. The operational amplifier is further coupled with second capacitive load cells when the second switched-capacitor network is coupled to the operational amplifier, and the second capacitive load cells are reset when the second switched-capacitor network is disconnected from the operational amplifier.

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