K630 - V640 - K660
1215-3608 rev. 1
FUNCTIONAL OVERVIEW
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The module is shielded using fence and lid technology. The main components contained are
transceiver ASIC, PA module, Front End Module and X-tal.
Frequency Generation
The 26 MHz reference signal is used as the reference for the on-chip synthesizer. To
cover the required frequency range, the integrated Voltage Controlled Oscillator (VCO)
operates at twice the frequency for band 1800/1900, and at four times the desired
frequency for band 850/900.
Transmitter
The transmitter block consists of the following sub-blocks:
A separate block is used to convert the digital bit streams from the baseband into parallel
words to be used in the DACs and the Sigma Delta modulator. This block also includes
programmable delays for optimizing delays between the different modulation paths.
The combined DAC and LP-filter is used to convert the digital words of the digital block
into analog signals.The second FM-path is used to add the high frequency part of the FM to the
VCO. It alsoincludes an auto-tuning block that compensates VCO gain variations.
The AM-block converts the differential voltage from the DAC to a single-ended output that
drives the PA. The output is scaled according to the desired output power, and an offset
can be added for PA linearization. The TX-buffer is used to drive the PA with the correct power
level. A divide by 2 or 4 block is used to generate the correct output frequency from the 4 GHz
VCO.
TX Frequency, Channel and Power Level Range:
GSM 850:
Frequency Range: 824,2 MHZ – 848,8 MHZ
Channel Range: 128 – 251
Power Level: Min: 19 – Max 5
GSM 900:
Frequency Range: 890,2 MHZ – 914,8 MHZ
Channel Range: 1 - 124
Power Level: Min: 19 – Max 5
EGSM 900:
Frequency Range: 880,2 MHZ – 889,8 MHZ
Channel Range: 975 - 1023
Power Level: Min: 19 – Max 5
DCS 1800:
Frequency Range: 1710,2 MHZ – 1784,8 MHZ
Channel Range: 512 – 885
Power Level: Min: 15 – Max 0
PCS 1900:
Frequency Range: 1850,2 MHZ – 1909,8 MHZ
Channel Range: 512 - 810
Power Level: Min: 15 – Max 0
Receiver
The receiver is a homodyne receiver with direct conversion of the received radio channel
to baseband I and Q channels. The analog signals are converted to digital bitstreams in a
sigma delta A/D converter. The receiver block consists of a front-end with separate LNAs for
each band and a common quadrature mixer. The front-end block is followed by a baseband
block with active antialiasing filters that also suppress blocking signals and interferers. After the
baseband block is a fully integrated Analog to Digital Converter of sigma delta structure
with high dynamic range. The digital output signals are sent over a serial interface to the
digital base-band circuit for further processing and detection.
RX Frequency and Channel Range
GSM 850:
Frequency Range: 869,2 MHZ – 893,8 MHZ
Channel Range: 128 – 251
GSM 900:
Frequency Range: 935,2 MHZ – 959,8 MHZ
Channel Range: 1 - 124
EGSM 900:
Frequency Range: 925,2 MHZ – 934,8 MHZ
Channel Range: 975 – 1023
DCS 1800:
Frequency Range: 1805,2 MHZ – 1879,8 MHZ
Channel Range: 512 – 885
PCS 1900:
Frequency Range: 1930,2 MHZ – 1989,8 MHZ
Channel Range: 512 - 810
WCDMA Radio Module N1210 (Squid)
RF 3100 is an integrated transceiver intended for the Universal Mobile
Telecommunication System (UMTS). The circuit is specially designed for the Frequency
Division Duplex (FDD) mode of the Wideband Code Division Multiple Access (WCDMA)
that operates in Band I (TX 1920-1980 MHz, RX 2110-2170 MHz).
The baluns, loop filters and most of the passive components are included in the package.
The WCDMA transceiver has the following features:
System in Package solution
Single band application (UMTS band I)
High Speed Downlink Packet Access (HSDPA) capability
Variable duplex in band I
Fully integrated TX baluns, loop filters and decoupling capacitors
Low noise, wide dynamic range for zero IF RX and TX
RX 87 dB gain control range in increments of 1 dB
TX 80 dB gain analog control range; 1 dB minimum resolution
RX 99 dB voltage gain
Maximum TX output power at least +5dBm average
Integrated RX channel filters (band I)
RX & TX fully integrated fractional-N synthesizer with AFC control capability
RX & TX fully integrated RF VCO with integrated supply voltage regulator
Supply voltage from 2.6 V to 3.0 V
3-wire serial interface bus
HVQFN40 package
Lead-free
Frequency Generation
The transmitter and receiver frequency synthesizers and the VCOs are fully integrated in
the WCDMA radio circuit. The signal from the crystal oscillator is used as a reference for
the synthesizers. The two synthesizers are controlled through the serial bus from the
access subsystem of the digital baseband controller.
Technical Description
SEMC Troubleshooting Manual
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(96)
