L8020

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

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www.unisonic.com.tw

QW-R123-015.b

TYPICAL APPLICATION CIRCUIT

A twin LNB design is as followed. In this block diagram, the UTC L8020 provides the two polarity switches

required to decode the two independent receiver feeds.

PIN

Diode

MUX

Control

X

X

Bias

Generator

Series

Horizontal

Antenna

Gain Stage

GaAs/HEMTFET

Vertical

Antenna

Gain Stage

GaAs/HEMTFET

L8020 Series

Dual H/V

Switch

Vertical

Horizontal

Mixer

Mixer

1

3

4

2

H/V Output 1

H/V Output 2

DC Input

13-25V

Control Input

<=14V-Horizontal

>=15V-Vertical

Local OSC

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exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.