| 摘要 |
A track and hold circuit includes an operational amplifier having first and second input ends and first and second output ends. A first capacitor has a first end and a second end operably coupled with the first input end and the first output end of the operational amplifier, respectively, wherein the second end of the first capacitor is switchably coupled with a first input voltage (Vinp). A second capacitor has a first end and a second end operably coupled with the second input end and the second output end of the operational amplifier, respectively, wherein the second end of the second capacitor is switchably coupled with a second input voltage (Vinn). A medium voltage (VMID) providing means selectively provides a voltage substantially equal to (Vinp+Vinn)/2, wherein the first ends of the first capacitor and second capacitor are operably coupled with the VMID providing means.
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