A Quantized Analog Delay for an ir-UWB Quadrature Downconversion Autocorrelation Receiver
other
A quantized analog delay is designed as a requirement for the autocorrelation function in the quadrature downconversion autocorrelation receiver (QDAR). The quantized analog delay is comprised of a quantizer, multiple binary delay lines and an adder circuit. Being the foremost element, the quantizer consists of a series of comparators, each one comparing the input signal to a unique reference voltage. The comparator outputs connect to binary delay lines, which are a cascade of synchronized D-latches. The outputs available at each line are linked together to reconstruct the incoming signal using an adder circuit. For a delay time of 550 ps, simulation results in IBM's CMOS 0.12 μm technology show that the quantized analog delay requires a total current of 36.7 mA at a 1.6 V power supply. Furthermore, delays in the range of several nanoseconds are feasible at the expense of power. After a Monte Carlo simulation it becomes evident that the response of the quantized analog delay does not suffer drastically from neither process nor component mismatch variations.
TNO Identifier
222899
Publisher
IEEE
Source title
Proceedings of the 2005 IEEE Conference on Ultra-Wideband - ICU 2005, 5-8 September, 2005, Zurich, Switzerland
Place of publication
Piscataway, NJ
Pages
328 - 332
Files
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