Patent ID: 7760250
Filing Date: 2010-07-20
Classification: H03H,H04N

Abstract:
1. An Analog Capacitor Memory (ACM) cell comprising: a capacitor having a first node and a second node; a first switch connected to the first node; a second switch connected to the second node; a third switch connected to the first node; a fourth switch connected to the second node; the first and second switches are connected to a first circuit; and the third and fourth switches are connected to a second circuit; wherein the first and second switches are closed and the third and fourth switches are open during a first period, and wherein the first and second switches are open, and the third and fourth switches are closed during a second period, such that a ground domain of the first circuit is decoupled from a ground domain of the second circuit; and wherein the second switch is opened before the first switch to remove any voltage dependent charge injection, and wherein the fourth switch is opened before the third switch to remove any voltage dependent charge injection.