Invention Grant
- Patent Title: Multi-path digital-to-analog converter
- Patent Title (中): 多路数模转换器
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Application No.: US15227913Application Date: 2016-08-03
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Publication No.: US09590648B2Publication Date: 2017-03-07
- Inventor: John Howard La Grou
- Applicant: John Howard La Grou
- Agency: Integral Patent
- Agent Laurence J. Shaw
- Main IPC: H03M1/06
- IPC: H03M1/06 ; H03M1/08 ; H03M1/66

Abstract:
A digital-to-analog converter which improves dynamic range by apportioning a least significant bits portion of an incoming digital signal to a low-path circuit and a most significant bits portion of the incoming digital signal to a high-path circuit. The low-path circuit has a low-path digital-to-analog converter, which feeds a low-path resistive element, which feeds an output node. The high-path circuit has a high-path digital-to-analog converter, which feeds a high-path resistive element, which feeds an output node. The output node is a simple electrical connection of the outputs of the low-path and high-path resistive elements. The system can further improve dynamic range by providing a high-path amplifier with control element(s) which reduce or eliminate high-path noise from the output node. Further dynamic range improvement is realized when the high-path control system takes advantage of the effects of psychoacoustic masking. Performance linearity is improved by a feedback system which monitors the output signal.
Public/Granted literature
- US20160344401A1 Multi-path digital-to-analog converter Public/Granted day:2016-11-24
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