Patent ID: 8188787
Filing Date: 2012-05-29
Classification: H03D

Abstract:
1. A peak detector for detecting peaks in a modulated signal, comprising: a charge storer configured to provide a peak detector output signal, the peak detector output signal indicative of the peaks in the modulated signal; a comparator configured to compare the modulated signal and the peak detector output signal to provide a comparison signal, the comparison signal being a first voltage level indicating that the modulated signal is greater than the peak detector output signal or a second voltage level indicating that the modulated signal is less than the peak detector output signal; and a charging controller configured to continuously provide a first current to the charge storer so as to decrease the peak detector output signal and to provide a second current to the charge storer when the comparison signal is at the first voltage level, the second current being greater than the first current such that a combination of the first current and the second current is able to charge the charge storer.