发明名称 |
Multi-channel digital to analog converter |
摘要 |
A digital to analog converter employs an operational amplifier as an active summing device for summing a first analog voltage corresponding to most significant bits of a digital value and a second analog voltage corresponding to least significant bits of the digital value. In a multi-channel application, a single MSB DAC can be shared by all channels through first MUXs in each channel with each channel having an independent LSB DAC. Alternatively, a single LSB DAC can be shared by all channels through second MUXs in each channel. Gain of the voltage summing operational amplifier in each channel is determined by values of a resistor connecting the output of the LSB DAC to the inverting negative input of the operational amplifier and of a feedback resistor connecting the amplifier output to the inverting negative input.
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申请公布号 |
US5294927(A) |
申请公布日期 |
1994.03.15 |
申请号 |
US19920868070 |
申请日期 |
1992.04.13 |
申请人 |
MICRO POWER SYSTEMS, INC. |
发明人 |
LEVINSON, ROGER A.;CARUSO, JOHN M.;TASDIGHI, ALI |
分类号 |
H03M1/68;H03M1/76;(IPC1-7):H03M1/68 |
主分类号 |
H03M1/68 |
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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