Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Phase shift by less than period of input
Reexamination Certificate
2006-11-21
2008-10-28
Cox, Cassandra (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Phase shift by less than period of input
C327S235000
Reexamination Certificate
active
07443220
ABSTRACT:
A phase shift circuit includes a 45° phase corrector that performs vector synthesis of signals supposed to have a 45° phase difference, out of a plurality of sets of orthogonal phase signals having an about 45° phase difference and an equal amplitude, the orthogonal phase signals in each set having undergone 90° phase correction, and outputs signals resulting from the vector synthesis, whereby a phase error between the orthogonal phase signals in the different sets is eliminated by the vector synthesis to make it possible to correct their phase difference to accurately 45°.
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Cox Cassandra
Fujitsu Limited
Staas & Halsey , LLP
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