- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373261 > RF137 Transceiver For GSM Applications PDF資料下載
參數(shù)資料
| 型號： | RF137 |
| 英文描述： | Transceiver For GSM Applications |
| 中文描述： | 收發(fā)器的GSM應(yīng)用 |
| 文件頁數(shù)： | 2/15頁 |
| 文件大?。?/td> | 114K |
| 代理商： | RF137 |
RF137
Transceiver
2
October 11, 2000
Conexant - Proprietary
Data Subject to Change
100777C
C018
Bias
Rx
Sx
Rx
Sx
BPC
TLCPO
GSEL1
PFD
90
VHF
Synthesizer
UHF
Synthesizer
3-Wire
Control
Tx
Tx
TX LO2
90
Ceramic
Filter
TXQ+
TXQ-
TXI+
TXI-
T
T
CHP
IF1IN+
IF1IN-
RES1
RES2
LO1IN+
LO1IN-
TXRFIN+
TXRFIN-
T
T
RXMXO
GSEL2
RX LO2
SX LO2
÷2÷4
RXENA
TXENA
VCPO
FREF
UCPO
CLK
DATA
LE
LD
IF2O+
IF2O-
IF2IN+
IF2IN-
÷2÷4
÷2÷4
÷1÷2
÷1÷2
+
Figure 2. RF137 Block Diagram
Technical Description
The RF137 Transceiver consists of three main sections:
Receive (Rx) section
Transmt (Tx) section
Synthesizer (Sx) section
The Rx, Tx, and Sx sections can be powered up or down
independently by setting RXENA, TXENA, and SXENA high or
low.
The signal pin assignments and functional pin descriptions are
found in Table 1. Table 2 provides the absolute maximum
ratings of the RF137. The general electrical characteristics are
provided in Table 3.
Receive Section
. The receive section consists of the following
functional blocks:
A first IF amplifier (selectable gain step of 24 dB).
An image reject mxer that downconverts froma first IF to a
second IF.
A buffer amplifier that precedes a second IF ceramc filter.
A second IF amplifier (selectable gain step of 12 dB) with
differential outputs.
The first IF amplifier is a Programmable Gain Amplifier (PGA)
with selectable gains of +18 or –6 dB. The amplifier gain is
controlled by a three-wire bus. The first IF amplifier is at a high
gain state when bit S7 = 1 (Rx Gain Sel1) and CO = 1 or at a
low gain state when bit S7 = 0 (Rx Gain Sel1) and CO = 1.
The image reject mxer relaxes the first IF filtering requirements
at the image frequency of the second mxer. Image rejection is
achieved for a high side/low side injection when bit S9 is set to
the appropriate logic level and CO = 1. Table 4 defines the
three-wire bus control and output states.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| RF1B | Fast-Recovery Rectifier Diodes (600 to 1000V) |
| RF1K4909396 | TRANSISTOR | MOSFET | MATCHED PAIR | P-CHANNEL | 12V V(BR)DSS | 2.5A I(D) | SO |
| RF1K4915696 | TRANSISTOR | MOSFET | N-CHANNEL | 30V V(BR)DSS | 6.3A I(D) | SO |
| RF1K4915796 | TRANSISTOR | MOSFET | N-CHANNEL | 30V V(BR)DSS | 6.3A I(D) | SO |
| RF1K4922196 | TRANSISTOR | MOSFET | MATCHED PAIR | N-CHANNEL | 60V V(BR)DSS | 2.5A I(D) | SO |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RF137-12 | 制造商:Conexant Systems Inc 功能描述:137-12 |
| RF1377-000 | 制造商:TE Connectivity 功能描述:- Bag 制造商:TE Connectivity 功能描述:POLYSWITCH PTC RESET 0.145A HOLD 制造商:TE CONNECTIVITY RAYCHEM-POLYSWITCH 功能描述:Tline / TRF250-145ST-B-0.5 |
| RF1378-000 | 制造商:TE Connectivity 功能描述:- Tape and Reel 制造商:TE Connectivity 功能描述:POLYSWITCH RESET FUSE 1.85A SMD 制造商:TE CONNECTIVITY RAYCHEM-POLYSWITCH 功能描述:SMD / ASMD185F-2 |
| RF1381-000 | 制造商:TE Connectivity 功能描述:- Trays 制造商:TE Connectivity 功能描述:GAS TUBE 5MM 230V 20% SMD 5KA 制造商:TE Connectivity 功能描述:GAS TUBE 5MM 90V 20% SMD 5KA 制造商:TE CONNECTIVITY RAYCHEM-POLYSWITCH 功能描述:GDT / GTCS35-231M-R05 |
| RF1382-000 | 制造商:TE Connectivity 功能描述:- Trays 制造商:TE CONNECTIVITY RAYCHEM-POLYSWITCH 功能描述:Gas Discharge Tubes 90VDC 5KADC 5AAC 1.2pF Solder Pad SMD |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。