Potential measuring device
AssigneeSony Semiconductor Solutions Corporation
InventorKoji Ogawa
Life of this patent
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Abstract
The present technology relates to a potential measuring device capable of acquiring a signal of low-frequency bands of approximately 1 Hz to 300 Hz. The potential measuring device includes: a unit cell that includes a readout electrode for reading a predetermined potential as a displacement with respect to a reference potential, an amplifier circuit that includes a common-source amplifier, the readout electrode being connected to an input node of the common-source amplifier, a predetermined bias voltage being applied to the input node via a resistor, and a buffer circuit that is connected to an output node of the amplifier circuit. The present technology is applicable to, for example, a device for measuring the potential of a solution on a microelectrode.
Claims20
A potential measuring device, comprising:
- a unit cell that includes:
- a readout electrode connected directly to an input voltage for reading a predetermined potential as a displacement with respect to a reference potential;
- an amplifier circuit that includes a common-source amplifier,
- wherein the common-source amplifier includes a first amplifier transistor and a load transistor and a high resistance element and an initialization switch connected in parallel between an input node and an output node of the common-source amplifier,
- wherein the readout electrode is connected to the input node of the common-source amplifier, and
- wherein a predetermined bias voltage is applied to the input node via the high resistance element;
- and
- a buffer circuit that is connected to the output node of the common-source amplifier.
A potential measuring device, comprising:
- a unit cell that includes:
- a readout electrode for reading a predetermined potential as a displacement with respect to a reference potential;
- an amplifier circuit that includes a common-source amplifier,
- wherein the common-source amplifier includes a first amplifier transistor and a load transistor and a high resistance element and an initialization switch connected in parallel between an input node and an output node of the common-source amplifier,
- wherein the readout electrode is connected to the input node of the common-source amplifier, and
- wherein a predetermined bias voltage is applied to the input node via the high resistance element;
- and
- a buffer circuit that is connected to the output node of the common-source amplifier.
Dependencies are inferred from the claim text.