LOG-LINEAR POWER DETECTOR

摘要

A power detector constituted of: a transconductance element arranged to output a rectified detection current, the magnitude thereof arranged to increase exponentially responsive to a linear increase in the amplitude of an input signal; and at least one p-n junction based device, a function of the rectified detection current arranged to flow there through. The output of the power detector is a function of the voltage across the at least one p-n junction based device.

主权项

1. A log-linear power detector comprising:
an input port arranged to receive a radio frequency (RF) power signal; a first transconductance element arranged to receive said RF power signal from said input port, said first transconductance element arranged to output a rectified detection current at an output of said first transconductance element, the magnitude of said rectified detection current arranged to increase exponentially responsive to an exponential increase in the power of said received RF power signal; at least one first p-n junction based device, a predetermined function of said rectified detection current arranged to flow through said at least one first p-n junction based device; and an output circuitry arranged to output a representation of the voltage across said at least one first p-n junction based device.