Patent ID: 6147481
Filing Date: 2000-11-14
Classification: G01R

Abstract:
A power detector for an RF circuit comprising:an RF input;first and second temperature sensitive resistors connected together with a common junction to which the RF input is connected, the first temperature resistor having a positive temperature coefficient of resistance and the second temperature sensitive resistor having a negative temperature coefficient of resistance;an output terminal connected to the common junction of said first and second temperature sensitive resistors;means for applying a DC voltage to one of the temperature sensitive resistors;third and fourth temperature sensitive resistors connected together with a common junction, the third temperature sensitive resistor having a positive temperature coefficient of resistance and the fourth temperature sensitive resistor having a negative temperature coefficient of resistance;a second output terminal connected to the common junction of the third and fourth temperature sensitive resistors; andthe means for applying a DC voltage is also connected to one of the third and fourth temperature sensitive resistors.