Circuit for simulating a capacitance fuel probe
AssigneeUltra Electronics Limited
InventorAndrew Ceri Davis
Life of this patent
Estimating the term…
Abstract
A circuit for simulating a capacitance fuel probe, the circuit comprising: an input for receiving an alternating current (AC) excitation signal; an output for outputting an output signal representing a capacitance of the simulated fuel probe; a single reference capacitance; a first amplifier connected to the reference capacitance, the first amplifier being configured to cause a current flow through the reference capacitance; a second, variable gain, amplifier, the second, variable gain amplifier being configured to output an AC signal representing a multiple of the current flow through the reference capacitance, wherein the AC signal output by the second amplifier is used to generate the output signal.
Claims7
A circuit for simulating a capacitance fuel probe, the circuit comprising:
- an input for receiving an alternating current (AC) excitation signal;
- an output for outputting an output signal representing a capacitance of the simulated fuel probe;
- a single reference capacitance;
- a first amplifier connected to the reference capacitance, the first amplifier being configured to cause a current flow through the reference capacitance;
- a second, variable gain, amplifier, the second, variable gain amplifier being configured to output an AC signal representing a multiple of the current flow through the reference capacitance, wherein the AC signal output by the second amplifier is used to generate the output signal, wherein a non-inverting input of the first amplifier is connected to a node that receives the AC signal output by the second amplifier and an inverting input of the first amplifier is connected to the reference capacitance.
Dependencies are inferred from the claim text.