UPC8131TA-E3 Просмотр технического описания (PDF) - NEC => Renesas Technology

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производитель

UPC8131TA-E3

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

NEC => Renesas Technology 

µPC8130TA, µPC8131TA

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

µPC8119T

µPC8120T

µPC8130TA

µPC8131TA

High frequency negative feed back

between OUT, VCC and VAGC pin

optimized by external choke

inductance.

Isolation of VCC to OUT pin

optimized by external choke

inductance.

External Feedback Capacitor of

VCC to VAGC Pin

Necessary

Unnecessary

Optimize Choke Inductance of π

Type Circuit on VCC Line

The impedance of inductance

should be very low at high

frequency region.

The impedance of inductance

should be very high at high

frequency region.

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