器件名称: U2791B-FS
功能描述: 1000 MHz Quadrature Demodulator
文件大小: 257.55KB 共11页
简 介:TELEFUNKEN Semiconductors
U2791B
1000 MHz Quadrature Demodulator
Description
U2791B silicon monolithic integrated circuit is a quadrature demodulator that is manufactured using TELEFUNKEN’s advanced UHF technology. This demodulator features a frequency range from 100 – 1000 MHz, low current consumption, selectable gain, power down mode and is adjustment free. The IC is suitable for direct conversion and image rejection applications in digital radio systems up to 1 GHz such as cellular radio, cordless telephone, cable TV and satellite TV systems.
Features
D Supply voltage 5 V (typ.) D Very low power consumption 125 mW (typ.) D Very good image rejection by means of phase control
loop for precise 90° phase shifting
D Duty cycle regeneration for single ended LO input
signal
D D D D
Low LO input level –10 dBm (typ.) LO – frequency from 100 MHz to 1 GHz Power down mode 25 dB gain control
Block Diagram
VS 5,6 Power down PD 14 IIX 4 II 3 1 IX OUTPUT 2 I 7 RFin 8 90°Control loop 0° 90° Frequency doubler Duty cycle regenerator 17 LO 13 PC 12 PCX Q 19 OUTPUT
20 QX 11 GC 15,16,18 GND 10 QQX 9 QQ
95 9755
Rev. A2: 08.06.1995
1 (11)
U2791B
Pin Description
IX I II IIX VS VS RFin RFXin QQ QQX 1 2 3 4 5 6 7 8 9 10
94 9441
TELEFUNKEN Semiconductors
20 QX 19 Q 18 17 GND LOin
16 GND 15 GND 14 PD 13 PC
12 PCX 11 GC
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Symbol IX I II IIX VS VS RFin RFXin QQ QQX GC PCX PC PD GND GND LOin GND Q QX
Function IX output I output II lo……
