发明名称 |
Switched-capacitor frequency-to-current converter |
摘要 |
A frequency-to-current converter operative to convert a clock frequency to an output current is described; the frequency-to-current converter ensures that the output current increases linearly with the clock frequency. The frequency-to-current converter may be incorporated in analog-to-digital converters driven by clocks with variable frequencies. The frequency-to-current converter employs an integrator circuit, used to compare an input reference voltage and a current feedback into a sampling capacitor. At steady state, the feedback current is just sufficient to discharge the sampling capacitor to a fixed voltage. The core of the frequency-to-current conversion circuit includes one opamp, two capacitors, one feedback transistor and a few switches.
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申请公布号 |
US6798372(B1) |
申请公布日期 |
2004.09.28 |
申请号 |
US20030405191 |
申请日期 |
2003.04.01 |
申请人 |
MAXIM INTEGRATED PRODUCTS, INC. |
发明人 |
YANG YAOHUA;JIANG RUOXIN;YIN RUMIN |
分类号 |
H03D13/00;H03K9/06;H03M1/60;(IPC1-7):H03M1/60 |
主分类号 |
H03D13/00 |
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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