DEMOBOARD-T7024PGM Atmel, DEMOBOARD-T7024PGM Datasheet - Page 17

BOARD DEMO FOR T7024PGM

DEMOBOARD-T7024PGM

Manufacturer Part Number
DEMOBOARD-T7024PGM
Description
BOARD DEMO FOR T7024PGM
Manufacturer
Atmel
Type
Bluetoothr

Specifications of DEMOBOARD-T7024PGM

Frequency
2.4GHz
Processor Series
T7024
Wireless Frequency
2.4 GHz
For Use With/related Products
T7024PGM
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
DEMOBOARD-T7024-PGM
Glossary
4549D–BLURF–06/04
8. What is the purpose of input and output matching?
9. Is it necessary to provide the PU signal, if the PA is driven?
10. Is it necessary to use a blocking capacitor as part of the LNA input matching?
Table 2. Used Abbreviations
Output matching of PA: the output of the PA device has to be matched to 50 Ohms in
order to get maximum output power and efficiency. It normally consists of a
transmission line or an inductor and a shunt capacitor to ground.
Input matching of PA: This is necessary to keep the interaction between PA and
preceding stage (i.e. VCO or transceiver circuit) as low as possible. Therefore it is a
condition for stable PA operation.
Input matching of LNA: This matching is necessary to keep the losses and the noise
figure low. It has therefore some influence on the sensitivity of the receive path
(minimum detectable input power).
Output matching of LNA: This matching leads to a low loss connection to the
transceiver. It also influences the minimum detectable input power.
No, since the PA is turned on and off with the ramp voltage, it is not necessary to
provide an PU signal. The PU signal has no influence on the PA.
Yes, it is necessary to use a blocking capacitor as a matching component for the
LNA input, since the input of the LNA is directly connected to the base of the first
amplifier stage in order to keep the noise figure to a minimum.
Abbreviation
WDCT
TDMA
DECT
GaAs
BOM
SIGE
AGC
DUT
PCB
VCO
PAE
ISM
CW
DC
PA
RF
IC
Description
Automatic Gain Control
Bill Of Material
Continuous Wave
Direct Current
Digital Enhanced Cordless Telecommunications
Device Under Test
Gallium Arsenic
Integrated Circuit
Industrial, Scientific,. Measurement
Power Amplifier
Power Added Efficiency
Printed Circuit Board
Radio Frequency
Silicon Germanium
Time Division Multiple Access
Voltage Controlled Oscillator
Worldwide Digital Cordless Telecommunications
Design Guide T7024
17

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