Patent ID: 11909364
Assignee: CYPRESS SEMICONDUCTOR CORPORATION
Field: Control (Instruments)
Classification: CPC H  G | IPC G  H

Claim 7:
8. The apparatus of claim 1, wherein the notch filter comprises:
the input to the notch filter is connected to a first switch of the first branch and a first switch of the second branch, the first switch of each of the first and second branches controlled by an enable signal;
the first switch of the first branch connected to a second switch of the first branch that is controlled by the chopping pulse and connected to the first capacitor;
the first switch of the second branch connected to a second switch of the second branch that is controlled by an inverse of the chopping pulse and connected to the second capacitor;
the second switch of the first branch, and the first capacitor, connected to a first terminal of the chopping delay switch and connected to a third switch of the first branch that is controlled by an inverse of the chopping pulse;
the second switch of the second branch, and the second capacitor, connected to a second terminal of the chopping delay switch and connected to a third switch of the second branch that is controlled by an inverse of one of the inverses of the chopping pulse, wherein to close the chopping delay switch is to short-circuit the first branch and the second branch of the notch filter, at the first capacitor and the second capacitor, to each other, to disable chopping in the notch filter; and
the third switch of the first branch and the third switch of the second branch connected to each other and to the output of the notch filter.