3.2 Power Amplifier Module (SKY77318)
The SKY77318 Power Amplifier Module (PAM) is designed in a low profile (1.2 mm), compact form
factor for quad-band cellular handsets comprising GSM850/900, DCS1800, and PCS1900 operation.
The PAM also supports Class 12 General Packet Radio Service (GPRS) multi-slot operation.
The module consists of separate GSM PA and DCS1800/PCS1900 PA blocks, impedance-matching
circuitry for 50
Ω
input and output impedances and a Power Amplifier Control (PAC) block with an
internal current-sense resistor. The custom BiCMOS integrated circuit provides the internal PAC
function and interface circuitry.
Fabricated onto a single Gallium Arsenide (GaAs) die, one Heterojunction Bipolar Transistor (HBT) PA
block supports the GSM bands and the other supports the DCS1800 and PCS1900 bands. Both PA
blocks share common power supply pins to distribute current.
The GaAs die, the Silicon (Si) die, and the passive components are mounted on a multi-layer laminate
substrate. The assembly is encapsulated with plastic overmold.
3. TECHNICAL BRIEF
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Figure. 3-2 SKY77318 FUNCTIONAL BLOCK DIAGRAM
Содержание KG270
Страница 1: ...Date April 2007 Issue 1 0 Service Manual Model KG270 MG160 Service Manual KG270 MG160 ...
Страница 3: ... 4 ...
Страница 81: ...5 DOWNLOAD 82 5 DOWNLOAD 5 1 Download Setup Configure system like figure 5 1 Figure 9 1 Download Setup ...
Страница 87: ... 88 6 BLOCK DIAGRAM 6 BLOCK DIAGRAM ...
Страница 92: ... 93 8 PCB LAYOUT ...
Страница 93: ... 94 8 PCB LAYOUT ...
Страница 104: ... 105 10 CALIBRATION 10 2 3 Click SETTING Memu 10 2 4 Setup Ezlooks menu such as the following fugure KG278 ...
Страница 106: ...10 CALIBRATION 107 10 2 7 Select MODEL 10 2 8 Click START for RF calibration 10 2 9 RF Calibration finish KG278 ...
Страница 107: ...10 CALIBRATION 108 10 2 10 Calibration data will be saved to the following folder ...
Страница 113: ... 114 ...
Страница 124: ...Note ...
Страница 125: ...Note ...