WM_PRJ_Q2501_PTS_002
- 001
March
2004
confidential ©
Page:
61 / 79
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged
without prior written agreement.
Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à
des tiers sans son autorisation préalable.
Filtering capacitors, near the module power supply, could also be
added.
Attention shall be paid to the ground track or the ground plane on the
application board for the power supply which supplies the module.
The ground track or the ground plane on the application board must
support current peaks as for the VBATT track.
If the ground track between the module and the power supply, is a
ground plane, it must not be parceled out.
The routing must be done in such a way that the total line impedance
must be
≤
10 m
Ω
@ 217 Hz. This impedance must include the via
impedances.
Same care shall be taken when routing the ground supply.
If these design rules are not followed, phase error (peak) and power loss could
occur.
In order to test the supply tracks, a burst simulation circuit is given hereafter.
This circuit simulates burst emissions, equivalent to bursts generated when
transmitting at full power.
Figure 37: Burst simulation circuit
Summary of Contents for WISMO Quik Q2501
Page 69: ......
