Patent ID: 7187316
Filing Date: 2007-03-06
Classification: G01R,G01T,H03M

Abstract:
1. An analog-to-digital converter comprising at least one stage, a first stage comprising: a first switch comprising a first terminal and a second terminal, the first terminal of the first switch being operatively coupled to an input signal; a second switch comprising a first terminal and a second terminal, the first terminal of the second switch being operatively coupled to the second terminal of the first switch; a first current source operatively coupled to the second terminal of the first switch, at least a portion of a first threshold being determined by the first current source; and a first discriminator operatively coupled to the second terminal of the second switch, the second switch being closed and the first switch being closed, the first discriminator changing state and the second switch being opened in response to a current associated with the input signal exceeding the first threshold, thereby indicating whether the current associated with the input signal is greater than the first threshold.