UPC8120T datasheet(8/40 Pages) NEC

부품명	UPC8120T

상세설명	-15 dBm INPUT, VARIABLE GAIN AMPLIFIER SILICON MMIC FOR TRANSMITTER AGC OF DIGITAL CELLULAR TELEPHONE

PDF	40 Pages

Scroll/Zoom	100%

제조업체	NEC [NEC]

홈페이지	http://www.nec.com/

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8 / 40 page

µµµµPC8130TA, µµµµPC8131TA

APPLICATION EXPLANATION

The

µPC8130TA and µPC8131TA has difference in internal circuit in order to reduce the number of external

component with

µPC8119T and µPC8120T. For this reason, they have difference in mechanism for determing

minimum gain and external suitable constant.

Determing Minimum Gain

External Feedback Capacitor of

VCC to VAGC Pin

Optimize Choke Inductance of

Type Circuit on VCC Line

µPC8119T

µPC8120T

High frequency negative feed back

between OUT, VCC and VAGC pin

optimized by external choke

inductance.

Necessary

The impedance of inductance

should be very low at high

frequency region.

µPC8130TA

µPC8131TA

Isolation of VCC to OUT pin

optimized by external choke

inductance.

Unnecessary

The impedance of inductance

should be very high at high

frequency region.

UPC8120T 데이터시트(PDF) 8 Page - NEC