Calibrated power detector

A system for calibrating a detector to measure power comprising:

• means for providing an alternating signal,
• means for providing an impedance,
• means responsive to the alternating signal for regulating the impedance to a particular value even with changes in the amplitude and frequency of the alternating signal,
• means including the regulated impedance for producing a reference voltage in response to the alternating signal,
• means responsive to the alternating signal and operatively coupled to the detector for producing a second voltage,
• means for providing a reference potential,
• means for comparing the combination of the reference and second voltages with the reference potential to produce an error signal, and
• means responsive to the error signal for adjusting the amplitude of the alternating signal to minimize the error signal.

A system for calibrating a detector further comprising:

• means for providing a reference potential,
• means for providing an alternating signal,
• a bridge circuit including a plurality of impedances, a particular one of the impedances in the plurality having a value variable with changes in its temperature to maintain a substantially constant impedance value in the bridge,
• means for introducing the alternating voltage to the bridge circuit to obtain from the bridge circuit a reference voltage related to the amplitude of the alternating voltage,
• means for introducing the alternating signal to the detector to obtain a voltage from the detector,
• data processing means responsive to the voltage from the detector for producing a voltage having an amplitude related to the amplitude of the voltage from the detector,
• means for comparing the combination of the reference voltage and the voltage from the data processing means with the reference potential to obtain an error signal, and
• means for introducing the error signal to the alternating signal means to obtain an adjustment in the amplitude of the alternating signal in a direction to minimize the error signal.

A system for calibrating the operation of a detector comprising:

• means for providing an alternating signal,
• means responsive to the amplitude of the alternating signal for providing an impedance having a regulated value regardless of changes in the amplitude of the alternating signal,
• means including the last mentioned means for detecting the amplitude of the alternating signal to produce a reference voltage,
• means response to the alternating signal for introducing the alternating signal to the detector,
• means operatively coupled to the detector for producing a second voltage representative of the alternating signal, means for providing a reference potential and
• means responsive to the combination of the reference voltage and the second voltage and to the reference potential for adjusting the amplitude of the alternating signal, in accordance with any differences between the reference potential and the combination of the reference voltage and the second voltage, in a direction to minimize any such differences.

A system for calibrating a voltage from a detector comprising:

• means for converting the voltage from the detector into digital signals,
• data processing means responsive to the digital signals for producing a digital output representative of the digital signals,
• means responsive to the output from the data processing means for converting this output into a analog voltage,
• means for providing a reference potential,
• means for comparing the reference potential and the analog voltage to produce an error signal, and
• means for introducing the error signal to the data processing means to change the voltage from the data processing means in a direction to minimize the error signal.

A system for calibrating a voltage from a detector comprising:

• means for converting the voltage into digital signals representative of voltage,
• data processing means for processing the digital signals to provide an output dependent upon such processing,
• means for converting the output from the data processing means into an analog voltage,
• means including a bridge circuit for providing a reference voltage,
• means for combining the analog voltage from the converting means and the reference voltage to produce a control voltage,
• means for providing a reference potential,
• means responsive to the control voltage and the reference potential to produce an error signal, and
• means for introducing the error signal to the data processing means to obtain an adjustment of the data processing means in a direction for eliminating the error signal.

A system for calibrating a voltage from a detector comprising:

• means for providing a first reference potential,
• means including a bridge for providing a direct voltage,
• data processing means for producing a digital output,
• means responsive to the digital output for converting the digital output into an analog voltage,
• means responsive to the first reference potential and the combination of the direct voltage and the analog voltage to produce an error signal,
• means for providing a second reference potential,
• means for comparing the second reference potential and the error signal for producing a control signal, and
• means for introducing the control signal to the data processing means to adjust the digital output in a direction for minimizing the control signal.