RFID

I assume you mean *passive* tags?

They are themselves powered by the power emitted by the reader.

They pass information to the reader by presenting a variable RF load.

...Jim Thompson

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | |

But don't count on a very long range.... a few feet tops. Brad PC Logic

Schematic entry and PCB design software

Yep! Most of my recent chip designs have been battery-powered tags with sleep-mode to keep the average power consumption in the mud.

...Jim Thompson

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | |