Detection cell with controlled power dissipation
AssigneeAgilent Technologies, Inc.
InventorsKlaus Witt, Bohuslav Gas
Life of this patent
Estimating the term…
Abstract
A voltage control circuitry for a detection cell (1) is described, whereby the detection cell (1) is adapted for determining an electrical property of a sample in a detection cell volume (2) of the detection cell (1). The voltage control circuitry comprises a power supply (5) adapted for providing a voltage (6) to the detection cell (1), and a power evaluation unit adapted for determining an actual power dissipation in the detection cell volume (12). The voltage control circuitry further comprises a control unit (14) adapted for comparing the actual power dissipation with a desired power dissipation, and for regulating the power supply's voltage (6) in a way that the actual power dissipation is driven towards the desired power dissipation.
Claims35
A voltage control circuitry for a detection cell (1), the detection cell (1) being adapted for determining an electrical property of a sample in a detection cell volume (2) of the detection cell (1), the voltage control circuitry comprising
- a power supply (5) adapted for providing a voltage (6) to the detection cell (1);
- a power evaluation unit adapted for determining an actual power dissipation in the detection cell volume (2);
- a control unit (14) adapted for comparing the actual power dissipation with a desired power dissipation, and for regulating the power supply's voltage (6) in a way that the actual power dissipation is driven towards the desired power dissipation.
A current control circuitry for a detection cell (18), the detection cell (18) being adapted for determining an electrical property of a sample in a detection cell volume (20) of the detection cell (18), the current control circuitry comprising
- a power supply (22) adapted for providing a current to the detection cell (18);
- a power evaluation unit adapted for determining an actual power dissipation in the detection cell volume (20);
- a control unit (28) adapted for comparing the actual power dissipation with a desired power dissipation, and for regulating the power supply's current in a way that the actual power dissipation is driven towards the desired power dissipation.
A method for determining an electrical property of a sample in a detection cell volume (2) of a detection cell (1), said method comprising the following steps:
- supplying a voltage (6) to the detection cell (1);
- evaluating an actual power dissipation in the detection cell volume (2);
- comparing the actual power dissipation with a desired power dissipation, and regulating the voltage in a way that the actual power dissipation is driven towards the desired power dissipation.
A method for determining an electrical property of a sample in a detection cell volume (20) of a detection cell (18), said method comprising the following steps:
- supplying a current to the detection cell (18);
- evaluating an actual power dissipation in the detection cell volume (20);
- comparing the actual power dissipation with a desired power dissipation, and regulating the current in a way that the actual power dissipation is driven towards the desired power dissipation.
Dependencies are inferred from the claim text.