CURRENT GENERATION CIRCUIT AND RANGING SYSTEM

A current generation circuit according to the present disclosure includes a constant current source (10), a current mirror circuit (20), and a gate length adjusting unit (9). The constant current source (10) is able to flow a reference current (Id) with a plurality of values. The current mirror circ...

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Bibliographische Detailangaben
1. Verfasser:	KAMIZURU, HAYATO
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	A current generation circuit according to the present disclosure includes a constant current source (10), a current mirror circuit (20), and a gate length adjusting unit (9). The constant current source (10) is able to flow a reference current (Id) with a plurality of values. The current mirror circuit (20) is constituted by a first transistor (40) that is connected to the constant current source (10) and second transistors (50) that are connected to respective single photon avalanche diode (SPAD) elements (6a). The gate length adjusting unit (9) adjusts, on the basis of the reference current (Id) that is set in the constant current source (10), a gate length of the first transistor (40) and a gate length of each of the second transistors (50).