Patent ID: 9281824
Filing Date: 2016-03-08
CPC Classification: G01R,H03L

Claim Text:
1. A chip with an amplitude detector, comprising: a differential pair amplifier having an AC interface to receive first and second AC signals generated by a controllable oscillator, the first and second AC signals with associated magnitudes, the first and second AC signals to cause the differential pair amplifier to change state at an output when at least one of the associated magnitudes exceeds a detector threshold level, the AC interface having first and second AC coupling capacitors, to receive the first and second AC signals, respectively; a threshold reference circuitry to control the detector threshold level; and a voltage amplifier to control in a closed loop the threshold reference circuitry against a DC reference wherein the voltage amplifier has an output coupled to a first current source for the threshold reference circuitry and to a second current source for the differential pair amplifier.