Constant-power constant-temperature resistive network
AssigneeAgilent Technologies, Inc.
InventorStephen Venzke
Life of this patent
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Abstract
A thermally stabilized device is described. Single or multiple input ports are accommodated and single and multiple power ports are described. The variation of resistance of a resistor subject to varying power dissipations is minimized by injecting complementary power dissipation and thermally linking it to the resistor. In this manner the temperature of a resistor may be maintained constant even though it dissipates varying amounts of power.
Claims35
A thermally stabilized device, comprising:
- a single signal port, which accepts an input signal and couples it to an input signal resistor;
- a single power port, which accepts an input power signal and couples it to an input power resistor;
- a thermal linking agent operable to provide a low-loss thermal path between the input signal resistor and the input power resistor, and
- wherein the input power signal provided to the input power resistor operates to maintain a constant power dissipated within the thermally stabilized device.
A thermally stabilized device, comprising:
- a plurality of signal ports which each accept an input signal of a plurality of input signals, with each input signal coupled to a corresponding input signal resistor of a plurality of input signal resistors;
- a power port, which accepts an input power signal and couples it to a power resistor;
- a thermal linking agent operable to provide a low loss thermal path between the plurality of input signal resistors and the power resistor, and
- wherein the input power signal provided to the input power resistor operates to maintain a constant power dissipated within the thermally stabilized device.
A thermally stabilized device, comprising:
- a signal port, which accepts an input signal and couples it to an input signal resistor;
- a plurality of power ports which each accept an input signal of a plurality of input power signals, with each input power signal coupled to a corresponding input power resistor of a plurality of input power resistors;
- a thermal linking agent operable to provide a low-loss thermal path between the plurality of input power resistors and the input signal resistor, and
- wherein the plurality of input power signals provided to the plurality of input power resistors operates to maintain a constant power dissipated within the thermally stabilized device.
A thermally stabilized device, comprising:
- a plurality of signal ports which each accept an input signal of a plurality of input signals, with each input signal coupled to a corresponding input signal resistor of a plurality of input signal resistors;
- a plurality of power ports which each accept an input signal of a plurality of input power signals, with each input power signal coupled to a corresponding input power resistor of a plurality of input power resistors;
- a thermal linking agent operable to provide a low-loss thermal path between the plurality of input signal resistors and the plurality of input power resistors, and
- wherein the plurality of input power signals provided to the plurality of input power resistors operates to maintain a constant power dissipated within the thermally stabilized device.
A method for maintaining a constant temperature for each of one or more input signal resistors of a thermally stabilized device, comprising:
- determining a total input signal power dissipated in a totality of one or more signal resistors of the thermally stabilized device;
- and
- dissipating a total power in a totality of one or more input power resistors of the thermally stabilized device as determined by a power constant less the total input signal power.
Dependencies are inferred from the claim text.