參數(shù)資料
型號(hào)： T2801
廠商： Atmel Corp.
英文描述： SPST to 4PST Slide DIP Switches
中文描述： 無(wú)繩單芯片收發(fā)器
文件頁(yè)數(shù)： 13/27頁(yè)
文件大?。?/td> 241K
代理商： T2801
T2801
Preliminary Information
Rev. A9, 11-Dec-01
13 (27)
Functional Description
Receiver
The RF signal at RF_IN is fed to an image rejection mixer
IR_MIXER with its differential outputs MIXER_OUT1
and MIXER_OUT2 driving an IF-SAW filter at
110.592 MHz or 112.32 MHz. The IF amplifiers
IF_AMP1 and IF_AMP2 with an external IF_TANK and
an integrated RSSI function feed the signal to the
demodulator DEMOD working at f = f
IF
/2 (
and finally to an integrated baseband filter BB. For
demodulator tuning in production an integrated 5-bit dig-
ital-to-analog (D/A) converter is provided to control the
on-chip varicap diode.
55 MHz)
Transmitter
The transmit data at TX_DATA is filtered by an integrated
Gaussian Filter GF and fed to the fully integrated VCO
operating at twice the output frequency. After modulation
the signal is frequency-divided by 2 and fed via a TX/RX
SWITCH to the TX_DRIVER. This bus-controlled driver
amplifier supplies typical +3 dBm output power at
TX_OUT. A ramp-signal generator RAMP_GEN, pro-
vides a ramp signal at RAMP_OUT for the external power
amplifier, is integrated. The slope of the ramp signal is
controlled by a capacitor at the RAMP_SET pin.
Synthesizer
The
programmable counter PC are driven by the fully
integrated VCO (including on-chip inductors and
varactors). An 3-bit digital-to-analog converter is used to
pretune the frequency. The output signal is frequency-
divided to supply the desired frequency to the
TX_DRIVER, 0/90 degree phase shifter for the
IR_MIXER and to be used by the PC for the phase detec-
tor PD (f
PD
= 3.456 MHz). Unlimited multislot operation
is possible by using the integrated advanced closed-loop
modulation
concept
based
compensation circuit MCC.
IR_MIXER,
the
TX_DRIVER
and
the
on
the
modulation
Power Supply
An integrated bandgap-stabilized voltage regulator for
use with an external low-cost PNP transistor is imple-
mented. Multiple power-down and current saving modes
are provided.
相關(guān)PDF資料
PDF描述
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T2803-PLQ SPST to 4PST Slide DIP Switches
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
T2801_06 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:DECT Single-Chip Transceiver
T2801B 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TRIAC|200V V(DRM)|6A I(T)RMS|TO-220
T2801C 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TRIAC|300V V(DRM)|6A I(T)RMS|TO-220
T2801D 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TRIAC|400V V(DRM)|6A I(T)RMS|TO-220
T2801E 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TRIAC|500V V(DRM)|6A I(T)RMS|TO-220
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