Patent ID: 11968468
Assignee: OMNIVISION TECHNOLOGIES, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. The ramp buffer circuit of claim 15, wherein the analog to digital converter further comprises:
a first current mirror transistor coupled to the power line and the current comparator circuit, wherein the first current mirror transistor is configured to provide the first variable current to the input of the current comparator circuit; and
a second current mirror transistor coupled to the power line, the variable current source circuit, and the first current mirror transistor, wherein a gate of the first current mirror transistor is coupled to a gate and a drain of the second current mirror transistor, wherein the second current mirror transistor and the variable current source circuit are coupled between the power line and ground, wherein a second variable current is configured to be conducted through the second current mirror transistor and the variable current source circuit.