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RFID

C

curt

Jan 1, 1970
0
Can someone explain how these transmit a signal,(What do they use for
power to do the transmitting??????)
 
J

Jim Thompson

Jan 1, 1970
0
Can someone explain how these transmit a signal,(What do they use for
power to do the transmitting??????)

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?"
 
J

Jim Thompson

Jan 1, 1970
0
On 02 Mar 2004 16:19:56 GMT, [email protected] (AtPCLogic) wrote:

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

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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