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US 2018/0375487 A1Published application
Methods and apparatus of adjusting delays of signals
AssigneeHuawei Technologies Co., Ltd.
InventorsFei Chen, Robert Morawski, Tho Le-Ngoc, James Gary Griffiths
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Abstract
In some examples, a delay apparatus includes a controllable delay line comprising a plurality of delay elements selectively connected in a signal path to vary a delay of a signal passing through the delay line, and a controllable phase shifter comprising reflective loads adjustable to vary a phase shift applied to the signal.
Claims20
A delay apparatus comprising:
- a controllable delay line comprising a plurality of delay elements selectively connected in a signal path to vary a delay of a signal passing through the controllable delay line;
- and
- a controllable phase shifter comprising a reflective load adjustable to vary a phase shift applied to the signal.
A method of delaying a signal, comprising:
- controlling a delay line to provide coarse adjustment of a delay of the signal;
- and
- controlling a phase shifter to provide a fine adjustment of a delay of the signal, wherein controlling the phase shifter comprises controlling a capacitance of a variable capacitive element of the phase shifter that further includes a shunt resistor connected in parallel with the variable capacitive element.
Dependencies are inferred from the claim text.