Patent ID: 6473603
Filing Date: 2002-10-29
Classification: H04B,H04W

Abstract:
A temperature compensation circuit for obtaining a temperature compensated power measurement of an information signal from an antenna unit, comprising:an impedance matching circuit, wherein said impedance matching circuit receives a power input and produces an impedance matching circuit output; a capacitor coupled to said impedance matching circuit, wherein said capacitor receives said impedance matching circuit output to introduce capacitance into said impedance matching circuit output as required; a diode pair coupled to said capacitor for producing an output which is a true average of detected output power from the antenna unit; an amplifier coupled to said diode pair, wherein said amplifier receives said diode pair output and produces the temperature compensated power measurement; a negative temperature coefficient thermistor coupled to said amplifier, wherein said negative temperature coefficient thermistor increases the temperature compensated power measurement at low temperatures; and a positive temperature coefficient thermistor coupled to said amplifier, wherein said positive temperature coefficient thermistor increases the temperature compensated power measurement output at high temperatures.