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RFID

Discussion in 'Misc Electronics' started by curt, Mar 2, 2004.

  1. curt

    curt Guest

    Can someone explain how these transmit a signal,(What do they use for
    power to do the transmitting??????)
     
  2. Jim Thompson

    Jim Thompson Guest

    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 |
    | http://www.analog-innovations.com | 1962 |

    "Will you love me when I'm sixty-four?"
     
  3. Jim Thompson

    Jim Thompson Guest

    On 02 Mar 2004 16:19:56 GMT, (AtPCLogic) wrote:

    [snip]
    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 |
    | http://www.analog-innovations.com | 1962 |

    "Will you love me when I'm sixty-four?"
     
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