NJM2593

Ver.2004-08-25

- 4 -

TEST CIRCUIT

This test circuit allows the measurement of all parameters described in “ELECTRICAL CHARACTERISTICS”. This

test circuit includes some electrical switches that should be in the suitable position for the measurement of each

parameter.

Test Circuit 1 (except for Gmix)

Test Circuit 2 (for Gmix)

450kHz

3300p

68k

68k

0.01u

1000p

1000p

20

19

18

17

16

15

14

13

12

11

BUFFER

OSC

MIXER

RSSI COMP

FILTER AMP

QUAD

DET

FSK COMP

CHARGE

1

2

3

4

5

6

7

8

9

10

FSK

OUT

CARRIER

SENSE

RSSI

OUT

V

+

68k

V

+

0.1u

51

0.1u

10u

10u

CD

560p

V

+

IF AMP

RSSI

100k

100k

A

B

IF FILTER

IF SW

1000p

Hi

Lo

CHARGE

SWITCH

-

+

+

-

+

-

+

-

AF

OUT

SENSE

LEVEL

51

1000p

51

IF IN

LO IN

RF IN

21.7MHz

21.25MHz

10u

R1

C1

OPEN

450kHz

3300p

68k

68k

0.01u

1000p

1000p

20

19

18

17

16

15

14

13

12

11

BUFFER

OSC

MIXER

RSSI COMP

FILTER AMP

QUAD

DET

FSK COMP

CHARGE

1

2

3

4

5

6

7

8

9

10

FSK

OUT

CARRIER

SENSE

RSSI

OUT

V

+

68k

V

+

0.1u

51

0.1u

10u

10u

CD

560p

V

+

IF AMP

RSSI

100k

100k

A

B

IF FILTER

IF SW

1000p

Hi

Lo

CHARGE

SWITCH

-

+

+

-

+

-

+

-

AF

OUT

SENSE

LEVEL

51

1000p

51

IF IN

LO IN

RF IN

21.7MHz

21.25MHz

10u

R1

C1

0.1u

1.8k

MIX OUT