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Circuit for reconstructing an analog signal from a digital signal and transmission system, particularly for WCDMA cellular telephony, including such circuit
Circuit for reconstructing an analog signal from a digital signal and transmission system, particularly for WCDMA cellular telephony, including such circuit
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机译:用于从数字信号和传输系统重建模拟信号的电路,特别是用于WCDMA蜂窝电话的电路,包括这种电路
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摘要
A circuit for reconstructing an analog signal starting from a digital input signal includes a digital to analog converter and a low pass-filter connected at the output of the converter for receiving the analog format signal and outputting a reconstructed analog signal. The low pass filter is an active filter continuous in time and current-coupled to the output of the digital-analog converter. The digital-analog converter is of the current-steering type functioning at a sampling frequency greater than the Nyquist frequency of the analog signal.
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