Invention Grant
- Patent Title: Multi-level capacitive digital-to-analog converter for use in a sigma-delta modulator
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Application No.: US16614957Application Date: 2018-04-18
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Publication No.: US10897232B2Publication Date: 2021-01-19
- Inventor: Daisuke Horii
- Applicant: ams AG
- Applicant Address: AT Premstaetten
- Assignee: ams AG
- Current Assignee: ams AG
- Current Assignee Address: AT Premstaetten
- Agency: MH2 Technology Law Group LLP
- Priority: EP17172738 20170524
- International Application: PCT/EP2018/059892 WO 20180418
- International Announcement: WO2018/215141 WO 20181129
- Main IPC: H03F3/00
- IPC: H03F3/00 ; H03M1/80 ; H03M3/00

Abstract:
A multi-level capacitive digital-to-analog converter, comprises at least one capacitor switch circuit (100) including a differential operational amplifier (130) having a first input node (E130a) and a second input node (E130b). A first current path (101) is coupled to a first reference input terminal (E100a) to apply a first reference potential (RefP) and the second current path (102) is coupled to a second reference input terminal (E100b) to apply a second reference potential (RefN). The at least one capacitor switch circuit (100) comprises a first controllable switch (111) being arranged between the second input node (E130a) of the differential operational amplifier (130) and the first current path (101). The at least one capacitor switch circuit (100) comprises a second controllable switch (112) being arranged between the first input node (E130a) of the differential operational amplifier (130) and the second current path (102).
Public/Granted literature
- US20200169228A1 A MULTI-LEVEL CAPACITIVE DIGITAL-TO-ANALOG CONVERTER FOR USE IN A SIGMA-DELTA MODULATOR Public/Granted day:2020-05-28
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