Electrical circuit for biasing or measuring current from a sensor

A potentiostat usable with a sensor, the potentiostat comprising:

• a comparator having two input terminals and an output terminal, the comparator being configured to compare input signals applied to the two input terminals and generate an output signal at the output terminal based on the comparison;
• a switch having a control terminal that is electrically coupled to the output terminal of the comparator, a first connection terminal that is electrically coupled to the sensor, and a second connection terminal that is electrically coupled to a charge-packet source, the switch being switchable between (i) an open state to electrically decouple the sensor from the charge-packet source, and (ii) a closed state to electrically couple the sensor to the charge-packet source, the switch being switchable between the open state and the closed state based on at least one of a control signal from a control element or the output signal from the output terminal of the comparator;
• and
• the charge-packet source.

A method for manufacturing an electrical circuit usable with a sensor, the method comprising:

• providing a comparator having two input terminals and an output terminal;
• enabling a first input terminal of the comparator to receive a reference voltage from a reference-voltage source;
• enabling a second input terminal of the comparator to receive an input signal from the sensor;
• providing a charge-packet source;
• providing a switch having two connection terminals and a control terminal;
• electrically coupling a first connection terminal of the switch to the charge-packet source;
• enabling a second input terminal of the switch to electrically couple with the sensor;
• and
• electrically coupling the output terminal of the comparator to the control terminal of the switch.