专利名称：Signal processing circuit and a method of
delaying a binary periodic input signal
发明人：Nils P. A. Liedberg申请号：US08/201851申请日：19940224公开号：US05471165A公开日：19951128
摘要：A signal processing circuit delays a binary periodic input signal. Three series-connected delay devices produce output signals that are delayed in relation to the inputsignal. The delay of the delay devices can be controlled to a very high degree of accuracy,in that the delay devices include a plurality of mutually identical series-connected delayelements which are manufactured at one and the same time by common process steps inone and the same semiconductor process. A controller compares in a phase detector thephase of the input signal with the phase of the output signal from the last delay device,and on the basis thereof delivers control signals to the delay devices. These controlsignals control the delay devices in a manner such that an equal number of delayelements will be activated in each of the delay devices, such that the delay devices willhave mutually the same delay. The total delay between the input signal and the lastoutput signal exceeds one-half but is less than one and a half periods of the input signalin a first regulating sequence, and the total delay reaches to one period of the inputsignal in a second regulating sequence.
申请人：TELEFONAKTIEBOLAGET LM ERICSSON
代理机构：Burns, Doane, Swecker & Mathis
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