Multi-Stage Sample and Hold Circuit

摘要

A circuit may include a first sample node configured to provide a low precision sample of an input signal, a second sample node configured to store a high precision sample of an input signal, and a first switch circuit coupled between an input and the first sample node. The circuit may further include a second switch circuit coupled between the first sample node and the second sample node and configured to limit leakage current that could discharge the second sample node.

主权项

1. A circuit comprising:
a first sample node configured to provide a low precision sample of an input signal; a second sample node configured to store a high precision sample of an input signal; a first switch circuit coupled between an input and the first sample node; and a second switch circuit including bulk material contact area, a first node coupled to the first sample node, a control node responsive to a control signal, and a second node coupled to the second sample node, the bulk material contact area configured to receive a voltage signal configured to reduce current leakage between bulk material and at least one of the first node and the second node during a hold phase.