US 12,451,902 B1
Low power time-interleaving DAC with pseudo interleaved architecture
Liang Fan, Irvine, CA (US); Afshin Mellati, Irvine, CA (US); Quanli Lu, Irvine, CA (US); Espen Olsen, Irvine, CA (US); Linghsiao Wang, Irvine, CA (US); and Cindra Abidin, Irvine, CA (US)
Assigned to MARVELL ASIA PTE LTD, Singapore (SG)
Filed by MARVELL ASIA PTE LTD, Singapore (SG)
Filed on Nov. 3, 2023, as Appl. No. 18/501,498.
Claims priority of provisional application 63/422,147, filed on Nov. 3, 2022.
Int. Cl. H03M 1/82 (2006.01)
CPC H03M 1/82 (2013.01) 20 Claims
OG exemplary drawing
 
1. A time-interleaved digital-to-analog converter (TIDAC) for an optical transmitter, the TIDAC comprising:
a DAC core having a plurality of slices and corresponding current sources respectively for converting complementary digital data signals to analog signals at output nodes of the DAC core;
down switch circuitry configured to connect, for each slice of the DAC core, a current from a corresponding one of the current sources to either a first data input path or a second data input path, the first data input path corresponding to first complementary data signals supplied to the slice of the DAC core and the second data input path corresponding to second complementary data signals supplied to the slice of the DAC core;
up switch circuitry configured to connect the current to the output nodes of the DAC; and
data switch circuitry configured to, for each slice of the DAC core, selectively connect the current received from the corresponding one of the current sources via the down switch circuitry and either the first data input path or the second data input path such that each of the current sources supplies current for the first complementary data signals and the second complementary data signals.