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US 8,803,091 B2Granted
Detection circuit, sensor device, and electronic instrument
AssigneeSeiko Epson Corporation
InventorMitsuhiro Yamamura
Life of this patent
Estimating the term…
Abstract
A detection circuit includes a current mirror circuit, a pyroelectric element, a capacitor element and a charging circuit. The pyroelectric element is disposed between a first power supply node and a first node connected to the current mirror circuit. The capacitor element is disposed between the first power supply node and a second node connected to the current mirror circuit. The charging circuit is connected to the current mirror circuit to charge the pyroelectric element and the capacitor element though the current mirror circuit.
Claims16
A detection circuit comprising:
- a current mirror circuit;
- a pyroelectric element disposed between a first power supply node and a first node connected to the current mirror circuit;
- a capacitor element disposed between the first power supply node and a second node connected to the current mirror circuit;
- and
- a charging circuit connected to the current mirror circuit to charge the pyroelectric element and the capacitor element though the current mirror circuit.
2 more elements
A sensor device comprising:
- a sensor array having a plurality of sensor cells;
- one or more row lines;
- one or more column lines;
- a row selecting circuit connected to the one or more row lines;
- and
- a read circuit connected to the one or more column lines, the read circuit including one or more capacitor elements respectively connected to the one or more column lines, and
- each of the sensor cells including
- a current mirror circuit,
- a pyroelectric element disposed between a first power supply node and a first node connected to the current mirror circuit, and
- a charging circuit connected to the current mirror circuit to charge the pyroelectric element and the capacitor element though the current mirror circuit.
7 more elements
Dependencies are inferred from the claim text.