Part 5: Power Supplies and Control signals (RF Board)
5.1: MicroMoe IC204 – Power Supply IC
The RF section has its own dedicated power supply device called: MicroMoe. This
is a smaller version of the ASIC MiniMoe, which is located on the logic board.
MicroMoe performs all power supply requirements of the RF circuitry, except for a
dedicated 5-volt supply (5VRF) for the UHF VCO’s which is supplied from MiniMoe.
The device consists of three voltage regulators that supply the power rails for the
RF circuits and is supplied from VBAT. See:
Fig.6.C: Power Supplies MiniMoe
(IC19) & MicroMoe (IC204).
MicroMoe provides the following outputs:-
2V8_RF1
(Regulator 3): 2.85V RF supply for the 13Mhz clock and
LMX2331 synthesiser.
2V8_RF2
(Regulator 2): 2.85V RF supply which supplies V_G_LNA and
V_P_LNA.
2V8_RF3
(Regulator 1): 2.85V RF supply used in the transmitter circuitry.
There are two enable signals which control the regulator’s:-
TCXO_ON
Enables supplies: 2V8_RF1 and 2V8_RF2. Signal derived from
NELL #P2.
TX_ON
Enables supply: 2V8_RF3, signal derived from IC27 #17.
5.2: Control signals and additional power supplies
The RF board has the following additional voltage supplies and control signals.
5V_RF
Regulated 5V supply for the VCO circuits and to supply
V_CONT. 5V derived from MiniMoe on logic board.
V_CONT
Switched version of the 5V_RF. This is supplied to the power
control circuitry and is switched on a frame before the TX burst.
V_G_LNA
Switched version of 2V8_RF2 to power the GSM LNA and the
RX switching diode: D400.
V_P_LNA
Switched version of 2V8_RF2 to power the PCN LNA and RX
switching diode: D401.
Содержание DB2000
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Страница 4: ...Important One incorrect adjustment may result in the need for many more and result in extra 0 1 2 2 ...
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Страница 83: ...Fit Antenna INSERT AND SCREW THE ANTENNA INTO THE ASSEMBLY ...
Страница 106: ...Part 5 Test Signals Fig 3 4 V_G_LNA Pg 3 5I TP300 Fig 3 5 V_P_LNA Pg 3 5J TP301 Fig 3 6 RX_ON2 Pg 3 16G TP405 ...
Страница 107: ...Fig 3 7 GSM_LNA Pg 3 3I TP419 Fig 3 8 PCN_LNA Pg 3 3J TP420 Fig 4 9 TCXO Pg 2 H11 TP413 ...
Страница 108: ...Fig 4 0 GSM Rx I Q s Pg 3 E F15TP406 7 Fig 4 1 PCN Rx I Q Pg 3 E F15 TP406 7 Fig 4 2 GSM_TX Pg 1 1I TP403 ...
Страница 109: ...Fig 4 3 PCN_TX Pg 1 1J TP417 Fig 4 4 3V_G_TX Pg 1 4I TP100 Fig 4 5 3V_P_TX Pg 1 4J TP101 ...
Страница 110: ...Fig 4 6 GSM_ON Pg 1 2K TP402 Fig 4 7 PCN_ON Pg 1 1K TP415 Fig 4 8 PRE_ON Pg 1 4J TP416 ...
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Страница 113: ...Fig 4 14 V_ERROR PCN Pwr Lvl 7Pg 1 16I Fig 4 15 300khz Charge Pump Pg 1 Log 9G ...
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