Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2007-06-15
2010-06-01
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S091000, C327S092000, C327S093000, C327S094000, C327S095000, C327S337000, C327S537000, C327S552000, C327S553000, C327S554000
Reexamination Certificate
active
07728650
ABSTRACT:
Switches with passive bootstrap that can achieve good sampling performance are described. In one design, a sampling circuit with passive bootstrap includes first and second filters and a switch. The first filter filters an input signal and provides a filtered input signal. The second filter filters a clock signal and provides a filtered clock signal. The switch receives a control signal formed based on the filtered input signal and the filtered clock signal and either passes or blocks the input signal based on the control signal. The first filter may be a lowpass filter having a first corner frequency that is higher than the bandwidth of the input signal. The second filter may be a highpass filter having a second corner frequency that is lower than the fundamental frequency of the clock signal. The first and second filters may both be implemented with one resistor and one capacitor.
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Dessouky, et al., “Very Low-Voltage Digital—Audio DS Modulator with 88-dB Dynamic Range Using Local Switch Bootstrapping,” IEEE Journal of Solid-State Circuits, vol. 36, No. 3, Mar. 2001, pp. 349-355.
Donovan Lincoln
Poos John W
QUALCOMM Incorporated
Xu Jiayu
LandOfFree
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