Digitizer system with passive pointer
作者： Jason Hoendervoogt , Brian Abernethy
DOI:
关键词: Physics 、 Foster–Seeley discriminator 、 Electromagnetic coil 、 LC circuit 、 Tuned radio frequency receiver 、 Grid 、 Frequency multiplier 、 Electrical engineering 、 Electrical conductor 、 Diode
摘要: A driving grid is driven by an ac signal comprising a carrier frequency modulated lower frequency. An untethered, batteryless pointer includes pick-up coil in first tuned circuit to the frequency, connected diodes second modulating Energy picked up from at drives Modulating signals induced receiving conductors are used locate usual manner. Because contains no component of signal, and sufficiently decoupled.
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