Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Phase shift by less than period of input
Patent
1997-12-23
1999-08-17
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Phase shift by less than period of input
327246, 327249, 327252, 332144, 332146, H03H 1116
Patent
active
059399180
ABSTRACT:
An electronic phase shifter splits an input signal into two signals whose amplitudes are set by a weighting circuit controlled by a phase shift control signal. Each of the two outputs of the weighting circuit is loaded with an RLC resonator, one tuned to a frequency lower than that of the input signal and one tuned to a frequency higher than that of the input signal. The loaded outputs are recombined in a vector summing network to synthesize the required phase shifted output signal. This technique permits implementation on a monolithic integrated circuit (MIC) with high gain at high frequencies (e.g. 10 GHz). It also allows a large dynamic range of operation and a large (i.e., greater than 90 degrees) controllable phase shift. This is accomplished without the use of variable reactance elements or any other components external to the MIC.
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"A 3Gb/s Bipolar Phase Shifter and AGC Amplifier" by Hans-Martin Rein et al., 1989 IEEE International Solid-State Circuits Conference, pp. 144-145.
Beggs Bruce C.
Jamal Rivaz
McGarry Steven Paul
Callahan Timothy P.
Kim Jung Ho
Northern Telecom Limited
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