PCF5077T 查看數據表（PDF） - Philips Electronics

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PCF5077T

Power amplifier controller for GSM and PCN systems

Philips Electronics 

Philips Semiconductors

Power amplifier controller for GSM and

PCN systems

Preliminary specification

PCF5077T

handbook, full pagewidth

TRIG

PD

KICKA

HPA

QRSA

DACA

RFIN

RF-ZERO

AS

BS

CS

DS

22Tcy 18Tcy 22Tcy

ES

FS

GS

HS

22Tcy 18Tcy 22Tcy

dB

4

1

1

6

30

70

2Tcy

t1 (8Tcy)

t2

(2Tcy)

,,,,,,,,,,,,,,,,,,,,,,,, B

C

,,,, 18Tcy

2Tcy

E

38Tcy

G

tON 200 µs

tOFF 44Tcy

(1)

(3)

(4)

(7)

(2)

(5)

(6)

MGK912

(1) tRFON = tON − 12Tcy to tON + 2Tcy.

(2) tRFOFF = 44Tcy to 66Tcy.

(3) VKICK (start integrator) applied to integrator.

(4) VPL applied to integrator.

(5) VQRS applied to integrator.

(6) VHOME at output of OP4.

(7) This timing of the RF input power (from the power module) ensures that the −70 dB margin is met, even if the isolation of the power module is bad.

Fig.3 Timing diagram of a typical ramp-up/ramp-down curve.

1997 Nov 19

7

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