Patent ID: 8183890
Filing Date: 2012-05-22
Classification: G11C,H03K

Abstract:
1. A sampling circuit, comprising: a switch having a control terminal, a first channel terminal and a second channel terminal; a first driving module configured to receive an analog input signal and drive onto the first channel terminal of the switch a first signal, the first signal being driven in response to the input signal, the first driving module further configured to drive the first signal substantially equivalent to the analog input signal; a bootstrap module coupled to the control terminal of the switch; and a second driving module configured to receive the analog input signal and drive onto the bootstrap module a second signal, the second signal being driven in response to the analog input signal, such that the bootstrap module varies a control voltage on the control terminal of the switch based on the analog input signal, the bootstrap module being configured to turn on the switch in a track-mode and cause an output voltage on the second channel terminal of the switch to track the first signal on the first channel terminal of the switch, the second driving module further configured to drive the second signal substantially equivalent to the analog input signal, a first error difference between a first output signal of the first driving module and the analog input signal being smaller than a second error difference between a second output signal of the second driving module and the analog input signal.