MC13144 데이터 시트보기 (PDF) - Motorola => Freescale

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MC13144

VHF – 2.0 GHz Low Noise Amplifier with Programmable Bias

Motorola => Freescale 

Freescale SMeCm1i3c14o4nductor, Inc.

CIRCUIT DESCRIPTION

General

ARTChHe MIVCE1D314B4YisFaRloEwEnSoCiseAaLmEplSifieErMwiItCh OproNgDraUmCmTabOleR,

bias. This device is designated for use in the front end section

in analog and digital FM systems such as Wireless Local

Area Network (LAN), Digital European Cordless Telephone

(DECT), PHS, PCS, GPS, Cellular, UHF and 800 MHz

INCL.N2A005

The LNA is a unique and patented

digitally (2–bit) programmable bias

Schematic). Typical gain of the LNA

noise figure of 1.4 dB at 900 MHz.

cascode amplifier with

(see Internal Circuit

is 17 dB for minimum

Special Mobile Radio (SMR), UHF Family Radio Services

Programmable Bias/Enable Circuit

and 902 to 928 MHz cordless telephones.

This unique circuit allows for 3 bias levels and a standby

mode in which the LNA can be externally biased as desired.

Current Regulation/Enable

Temperature compensating voltage independent current

regulation is digitally controlled by a 2–bit programmable

bias/enable circuit.

Figure 1. MC13144 Internal Circuit*

4

VCC

5 RF

Output

400

10 p

–A

8 En1

En2

7

6 VEE

1

RF In

2, 3

VEE

V1

V2

V3

NOTE: * The MC13144 uses a unique and patent pending circuit topology.

MOTOROLA RF/IF DEVICE DATA For More Information On This Product,

3

Go to: www.freescale.com

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