Patent ID: 7292071

Claim:
A method of signal sampling/holding, for a signal sampling/holding circuit, the signal sampling/holding circuit having a first signal sampling/holding device, a second signal sampling/holding device, a target signal source and a reference voltage, the signal sampling/holding method comprising: coupling the reference voltage to the first signal sampling/holding device before coupling the target signal source to the first signal sampling/holding device for sampling the target signal source; coupling the reference voltage to the second signal sampling/holding device before coupling the target signal source to the second signal sampling/holding device for sampling the target signal source; disconnecting the reference voltage from the first signal sampling/holding device before disconnecting the target signal source for holding the target signal source sampled in the first signal sampling/holding device, wherein there is a first period during which the reference voltage and the target signal source are both coupled to the first signal sampling/holding device; and disconnecting the reference voltage from the second signal sampling/holding device before disconnecting the target signal source for holding the target signal source sampled in the second signal sampling/holding device, wherein there is a second period during which the reference voltage and the target signal source are both coupled to the second signal sampling/holding device.