Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Reexamination Certificate
2011-01-04
2011-01-04
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
C327S058000, C327S059000, C327S060000, C327S061000, C327S066000, C327S067000, C327S551000
Reexamination Certificate
active
07863940
ABSTRACT:
An envelope detecting circuit is provided. The envelope detecting circuit comprises a source degeneration circuit that amplifies an input differential signal, a differential gain stage that supplies a voltage proportional to the amplified signal, a potential hold circuit that holds the voltage supplied from the gain stage, a comparator circuit that compares the voltage held by the potential holding circuit with a reference potential to output a detect signal, and envelope level adjustment and selection unit that responds to the detect signal and outputs a control signal to the source degeneration circuit.
REFERENCES:
patent: 7053674 (2006-05-01), Romero et al.
patent: 7218903 (2007-05-01), Komatsu et al.
Savoj, J., et al., “A 3.125-Gb/s Sub-Milliwatt CMOS Signal Detector Circuit,” 2005 Symposium on VLSI Circuits Digest of Technical Papers, pp. 198-201.
Sugawara, M., et al., “1.5 Gbps, 5150 ppm Spread Spectrum SerDes PHY with a 0.3 mW, 1.5 Gbps Level Detector for Serial ATA,” 2002 Symposium On VLSI Circuits Digest of Technical Papers, pp. 60-63.
Donovan Lincoln
Poos John W
Slater & Matsil L.L.P.
Taiwan Semiconductor Manufacturing Company , Ltd.
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