Calibration apparatus and method for sampler with adjustable high frequency gain
First Claim
1. A method comprising:
- initializing respective pairs of output nodes of first and second sampler stages prior to a sampling interval;
receiving a differential input voltage at an input of the first sampler stage and generating, responsive to an initiation of the sampling interval according to a clock signal, a time-varying differential voltage on the respective pair of output nodes of the first sampler stage; and
generating, responsive to the time-varying voltage on the respective pair of output nodes of the first sampler stage, a differential output voltage on the respective pair of output nodes of the second sampler stage during the sampling interval.
1 Assignment
0 Petitions
Accused Products
Abstract
Methods and systems are described for receiving a sampling signal, pre-charging a pair of output nodes prior to a sampling interval, initiating the sampling interval by enabling a current source according to a first transition of the received sampling signal, generating a differential output voltage at the pair of output nodes by discharging the pair of output nodes according to a differential input signal, the pair of output nodes discharged according to current drawn by the current source during the sampling interval, terminating the sampling interval by disabling the current source in response to a second transition of the received sampling signal, and inhibiting a recharge of the pair of output nodes for a hold time after termination of the sampling interval and prior to initiation of a subsequent sampling interval.
-
Citations
20 Claims
-
1. A method comprising:
-
initializing respective pairs of output nodes of first and second sampler stages prior to a sampling interval; receiving a differential input voltage at an input of the first sampler stage and generating, responsive to an initiation of the sampling interval according to a clock signal, a time-varying differential voltage on the respective pair of output nodes of the first sampler stage; and generating, responsive to the time-varying voltage on the respective pair of output nodes of the first sampler stage, a differential output voltage on the respective pair of output nodes of the second sampler stage during the sampling interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An apparatus comprising:
-
a reset circuit configured to initialize respective pairs of output nodes of first and second sampler stages prior to a sampling interval; the first sampler stage configured to receive a differential input voltage at an input of the first sampler stage and to generate, responsive to an initiation of the sampling interval according to a clock signal, a time-varying differential voltage on the respective pair of output nodes of the first sampler stage; and the second sampler stage configured to generate, responsive to the time-varying voltage on the respective pair of output nodes of the first sampler stage, a differential output voltage on the respective pair of output nodes of the second sampler stage during the sampling interval. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification