公开(公告)号：US11290065B2

公开(公告)日：2022-03-29

申请号：US16650882

申请日：2017-12-29

Applicant: Intel IP Corporation

Inventor： Ali Azam ,  Ashoke Ravi ,  Bassam Khamaisi ,  Ofir Degani

IPC: H03F1/02 ,  H03F3/00 ,  H03F3/19 ,  H03F3/217 ,  H03M1/08

Abstract: A switched capacitor digital power amplifier (DPA) or a digital-to-analog converter (DAC) is disclosed. The DPA/DAC includes a plurality of switched capacitor cells connected in parallel. Each switched capacitor cell includes a capacitor and a switch. The switch selectively drives the capacitor in response to an input digital codeword. The switched capacitor cells are divided into sub-arrays and a series capacitor is inserted in series between two adjacent sub-arrays of switched capacitor cells. All the sub-arrays of switched capacitor cells may be in a unary-coded structure. Alternatively, at least one of the sub-arrays may be in a C-2C structure and at least one another sub-array may be in a unary-coded structure. The switch in the switched capacitor cells is driven by a local oscillator signal, and a phase correction buffer may be added for adjusting a delay of the local oscillator signal supplied to sub-arrays of switched capacitor cells.