A fully differential switched-current mode twice interleaved track-and-hold circuit has been integrated in a 0.8 /spl mu/m f/sub T/ 12 GHz BiCMOS technology. Used as a single channel T&H circuit (not interleaved), measurements have shown a THD of -58 dB (9,3 bits) for a sampling frequency of 100 MHz under Nyquist condition. Furthermore, in the same operation mode, the circuit is also able to sample a 20 MHz FS input signal at 200 MHz while keeping a THD of -65 dB. The switched-current memory cell consumes 41 mW (excluding input and output stages) at 5 V. Operation in a twice interleaved mode is also presented.
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机译：全差分开关电流模式两次交错的采样保持电路已集成到0.8 / spl mu / m f / sub T / 12 GHz BiCMOS技术中。用作单通道T＆H电路（非交错）时，在奈奎斯特条件下，对于100 MHz的采样频率，THD为-58 dB（9.3位）。此外，在相同的工作模式下，该电路还能够在200 MHz时对20 MHz FS输入信号进行采样，同时保持THD为-65 dB。开关电流存储单元在5 V时消耗41 mW（不包括输入和输出级）。还介绍了两次交错模式下的操作。
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