Invention Application
- Patent Title: HYBRID R-2R STRUCTURE FOR LOW GLITCH NOISE SEGMENTED DAC
- Patent Title (中): 混合R-2R结构用于低玻璃噪声分离DAC
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Application No.: PCT/US2015/029535Application Date: 2015-05-06
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Publication No.: WO2015183496A1Publication Date: 2015-12-03
- Inventor: LEE, Sang Min , SEO, Dongwon
- Applicant: QUALCOMM INCORPORATED
- Applicant Address: Attn: International IP Administration 5775 Morehouse Drive San Diego, California 92121-1714 US
- Assignee: QUALCOMM INCORPORATED
- Current Assignee: QUALCOMM INCORPORATED
- Current Assignee Address: Attn: International IP Administration 5775 Morehouse Drive San Diego, California 92121-1714 US
- Agency: GELFOUND, Craig A. et al.
- Priority: US62/003,497 20140527; US14/493,254 20140922
- Main IPC: H03M1/06
- IPC: H03M1/06 ; H03M1/08 ; H03M1/68 ; H03M1/78
Abstract:
The apparatus may be an N-bit DAC including (2M-1) parallel stages associated with M most significant bits, and (N-M) stages associated with (N-M) least significant bits. The (2M-1) parallel stages may deliver a first current to current-summing nodes of the DAC. The (N-M) stages may include a resistive network and a second pair of switches, and may deliver a second current to the resistive network of the stage. Each resistive network may scale the respectively delivered currents according to a binary weight of a stage corresponding to the resistive network, and may deliver the scaled currents to the pair of current-summing nodes. At least one of the (N-M) stages may be separated from the remaining stages.
Information query