GaAs MMIC

CGY 94

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Siemens Aktiengesellschaft

pg. 2/9

17.10.95

HL EH PD 21

Functional block diagram:

Control circuit:

The drain current ID of the CGY 94 is

adjusted by the internal control circuit.

Therefore a negative voltage (-4V...-6V)

has to be supplied at VG. For transmit

operation VTR must be set to 0V. During

receive operation VTR should be dis-

connected (shut off mode).

Pin #

Configuration

1

VG

Negative voltage at control circuit (-4V...-6V)

2

VTR

Control voltage for transmit mode (0V) or receive mode (open)

3,4,5,10

GND 2

RF and DC ground of the 2nd stage

6,9

GND 1

RF and DC ground of the 1st stage

7

VD1

Positive drain voltage of the 1st stage

8

RFin

RF input power

11

GND 3

Ground for internal output matching

12

VD2, RFout

Positive drain voltage of the 2nd stage, RF output power

DC characteristics

Characteristics

Symbol Conditions

min

typ

max

Unit

Drain current

stage 1

IDSS1

VD=3V, VG=0V, VTR n.c.

0.6

0.9

1.3

A

stage 2

IDSS2

2.7

4.1

5.9

A

Drain current with

active current control

ID

VD=3V, VG=-4V, VTR=0V

-

1.1

-

A

Transconductance

gfs1

VD=3V, ID=350mA

0.25

0.32

-

S

(stage 1 and 2)

gfs2

VD=3V, ID=700mA

1.1

1.3

-

S

Pinch off voltage

Vp

VD=3V, ID<500

µA

(all stages)

-3.8

-2.8

-1.8

V

Pin (8)

Pout (12)

GND1 (6, 9)

GND2

VD1 (7)

VD2 (12)

VG (1)

GND3 (11)

Control

Circuit

VTR (2)

(3, 4, 5, 10)