发明名称 |
DIGITAL-TO-ANALOGUE CONVERTER |
摘要 |
<p>The invention relates to digital-to-analog converters for converting current. The converter includes a pair of differential branches with two transistors controlled by a digital register activated at a clock frequency, and two resistive loads receiving the currents of the differential branches to produce a differential electrical signal representing the analog result of the conversion. The converter includes a dual switching circuit for the currents of the differential branches: a first switching circuit enables the transmission of the currents of the differential branches toward the loads for 70% to 95% of the clock period and shunts these currents outside the loads for the rest of the time; a second switching circuit alternately and symmetrically makes a direct link followed by a cross link between the differential branches and the loads. The converter provides a signal with high spectral purity and can work with a good level of power in the four Nyquist zones of the spectrum of the output analog signal, and notably in the second and third zones.</p> |
申请公布号 |
EP2769473(A1) |
申请公布日期 |
2014.08.27 |
申请号 |
EP20120769106 |
申请日期 |
2012.10.08 |
申请人 |
E2V SEMICONDUCTORS |
发明人 |
BORE, FRANÇOIS;WINGENDER, MARC;DUMAINE, EMMANUEL |
分类号 |
H03M1/08;H03M1/74 |
主分类号 |
H03M1/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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