Patent ID: 11861093
Assignee: SILEAD INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G  H

Claim 11:
12. An analog-to-digital converter (ADC) comprising an integrator and a charge source circuit, wherein charge source circuit comprising:
a reference current generation block configured to provide a reference current;
a current mirror block coupled to the reference current generation block and configured to mirror the reference current; and
a charge output block coupled to the current mirror block and configured to convert the mirrored current from the current mirror block into a corresponding amount of charge and output the amount of charge according to the following formula:

Qdc=Idc*t,

where Qdc is the amount of charge output from the charge output block, Idc is a current provided by the charge output block, and t is a period of time in which the charge output block provides the current, wherein the period t is divided into at least two consecutive time intervals with lengths which form a sequence with ratios equal to a power of 2, thereby enabling continuous adjustability of the amount of charge Qdc.