Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By frequency
Patent
1997-08-19
1999-11-09
Le, Dinh
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By frequency
327 41, 327113, 327355, 375327, 375344, 329307, 331 12, H03L 7087, H03L 7093
Patent
active
059822007
ABSTRACT:
By using the two square-law circuits for squaring the common mode and orthogonal components of the carrier wave and by using the multiplying circuit for multiplying these squared signals, the Costas loop carrier recovery circuit can be constituted. The carrier recovery circuit is constituted such that a phase synchronous circuit constituted by a PLL is controlled by a signal obtained by removing a sign component from an input carrier wave.
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Le Dinh
NEC Corporation
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