US 6,642,703 B2 · Peak detector and detecting method thereof

Abstract

The invention provides a peak detector having input signal triggering control and low frequency energy attenuation capability. The peak detector includes a charging unit and a discharging unit. By being triggered by a peak value detected in a received input signal by comparing voltage potential levels of the output signal of the peak detector and the received signal, the charging unit charges an electrical charge storage unit, for example, a capacitor, connected to the output terminal of the peak detector for a pre-determined charge duration in accordance with a charge pulse being in a logic high. After the pre-determined charge duration of charging operation, before being triggered by a next peak value of the received input signal, the discharging unit discharges the electrical charge storage unit for a pre-determined discharge duration in accordance with a discharge pulse being in a logic high or in accordance with a plurality of discharge pulses, which is determined by design desired.

Claims18

Dependent claims

A peak detector, for receiving an input signal and output a peak signal from an output terminal, the peak detector comprising:

a comparator for receiving the input signal and the peak signal and generating a comparing signal by comparing the input signal and the peak signal;
a programmable pulse generator, for receiving the comparing signal and generating a first pulse signal and a second pulse signal in according to the comparing signal;
a logic unit, for receiving the first pulse signal and the second pulse signal and outputting a first control signal and a second control signal;
an electrical charge storage unit, coupled to the output terminal of the peak detector;
and
a charging unit and a discharge unit, the charging unit charging the electrical charge storage unit during a pre-determined charge duration in response to the first control signal to increase a voltage potential level of the peak signal, the discharge unit discharging the electrical charge storage unit during a pre-determined discharge duration in response to the second control signal to decrease the voltage potential level of the peak signal.

3 more elements

Dependencies are inferred from the claim text.

Peak detector and detecting method thereof

Life of this patent

Peak detector and detecting method thereof

Life of this patent

Abstract

Claims18