Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Reexamination Certificate
2006-07-24
2010-06-15
Lam, Tuan (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
C327S059000, C327S073000
Reexamination Certificate
active
07737731
ABSTRACT:
To detect the peaks level of an incoming signal, the difference between the voltage level of the incoming signal and a voltage developed across a capacitor is amplified. The amplified difference signal is applied to a transconductor adapted to vary its output current in response to changes in the amplified difference signal. The variations in the current generated by the transconductor are used to change a current flowing through a current mirror that charges the capacitor. The voltage developed across the capacitor represents the detected peak. The capacitor is discharged to a predefined voltage level during the reset periods. A second amplifier receiving the capacitor voltage is optionally used to develop a voltage across a second capacitor that is not reset and thus carries only the detected peak levels.
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Annadore Sriharsha
Li Yingxuan
Luo Qiang
Sutardja Pantas
Lam Tuan
Marvell International Ltd.
Nguyen Hiep
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