AN2866

Simplified equivalent inlay circuit

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Simplified equivalent inlay circuit

The chip and its antenna can be symbolized using their equivalent electrical circuit.

Figure 3 shows the equivalent electrical circuit of the chip (parallel association of a

resistance which emulates the current consumption of the chip and a capacitance added to

the chip to ease tuning).

The antenna is a wire, so its equivalent electrical circuit is a wire with a resistance

Figure 3.

Equivalent circuit of a chip and its antenna

ai15804

A

B

Chip

Antenna