- 您现在的位置：买卖IC网 > PDF目录68777 > 1243-TYPE Uncooled Laser Transmitter PDF资料下载
参数资料
| 型号： | 1243-TYPE |
| 英文描述： | Uncooled Laser Transmitter |
| 中文描述： | 非致冷激光发射器 |
| 文件页数： | 1/12页 |
| 文件大小： | 199K |
| 代理商： | 1243-TYPE |
W3011
1 GHz Quadrature Modulator
Data Sheet
September 1999
Features
+ Guaranteed performance at 2.7 V power supply
+ Output power of 3 dBm into 50 load (single-
ended) with 3 V operation
+ Direct RF modulation with or without offset mixer
+ Automatic power control (APC) capability
+ Accurate 90° phase shifter for carrier
+ Double-balanced active mixers minimize carrier
feedthrough (origin offset)
+ Low-current sleep mode
Applications
+ PDC 800 and American digital cellular mobile
terminals
+ Cellular base stations
Description
The W3011 1 GHz Quadrature Modulator is a
monolithic integrated circuit that provides direct
modulation of an RF carrier by I & Q baseband
inputs. It is particularly suited for use in mobile and
handheld cellular telephones designed to the IS-136
(North American 824 MHz to 849 MHz), PDC
(Japan RCR-STD27 889 MHz to 958 MHz), and
other digital personal-communications standards.
The circuit block diagram is shown in Figure 1. From
two LO signals, LOL and LOH, the offset mixer
produces an internal LO signal, which prevents the
external VCOs from being pulled by the large
transmitted signal. The phase shifter splits the LO
signal into two carriers with 90° phase separation
and equal amplitude.
These signals are fed to the in-phase (I) and
quadrature-phase (Q) double-balanced mixers. The
resulting signals are summed and fed into the output
amplifier. This amplifier can provide 0 dBm linear
output power, minimum, into a 50
load.
The output power can be attenuated up to 50 dB by
applying a control voltage to the APC input.
Nominally, the output power is at maximum
(+3 dBm) with VAPC > 2.2 V, and at minimum
(–50 dBm) with VAPC < 0.8 V.
A CMOS/TTL-compatible logic input allows the
device to be put into a powerdown mode in which
less than 10 A of supply current is consumed.
BIAS AND CONTROL
VCC
ENABLE
GROUND
∑
φ
EXTERNAL FILTER
OR
DIRECT LO INPUT
APC
RFOUT
–
π/4
+π/4
Q
I
LOL IN
50
LOH IN
50
Figure 1. Circuit Block Diagram
相关PDF资料 |
PDF描述 |
|---|---|
| 1245-TYPE | Uncooled Laser Transmitter |
| 125-0212-3 | EINBAUSTECKER PUSH PULL 8POL |
| 125-0213-6 | STECKER PUSH PULL 4POL |
| 125-0214-9 | KUPPLUNG PUSH PULL 4POL |
| 125-0215-1 | STECKER PUSH PULL 6POL |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 1244 | 功能描述:电缆固定件和配件 SR 7N-2 (BLACK) RoHS:否 制造商:Heyco 类型:Cable Grips, Liquid Tight 材料:Nylon 颜色:Black 安装方法:Cable 最大光束直径:11.4 mm 抗拉强度: |
| 1244 BK001 | 功能描述:多芯电缆 1000’ 2C 20AWG UNSHL RoHS:否 制造商:Alpha Wire 导体数量:3 线规 - 美国线规（AWG）:16 绞合:19 x 29 屏蔽:Shielded 长度:100 ft 电压额定值:600 V 外壳材料:Polytetrafluoroethylene (PTFE) 绝缘材料:Polytetrafluoroethylene (PTFE) 类型:Communication and Control |
| 1244 BK002 | 制造商:Belden Inc 功能描述:UNSHLD MULTICOND CABLE 2COND 20AWG 500FT, Reel Length (Imperial):500ft, Reel Len |
| 1244 BK005 | 功能描述:多芯电缆 2C 20AWG UNSHLD/CBL 100’ SPOOL BLACK RoHS:否 制造商:Alpha Wire 导体数量:3 线规 - 美国线规（AWG）:16 绞合:19 x 29 屏蔽:Shielded 长度:100 ft 电压额定值:600 V 外壳材料:Polytetrafluoroethylene (PTFE) 绝缘材料:Polytetrafluoroethylene (PTFE) 类型:Communication and Control |
| 12440 | 制造商:SUNNEX 功能描述:INSPECTION LIGHT ARM 700MM |
发布紧急采购，3分钟左右您将得到回复。