Philips AN1651 NE570/571/SA571 System Level, Fiber Optic Data Receiver, Application note, Vrms

Philips Semiconductors	Application note
Using the NE/SA5234 amplifier	AN1651

+16dB

0dB

-20dB

-40dB

-60dB

-80dB

VRMS

2.65V

1.67V

420mV

42mV

4.2mV

420μV

42μV

[	1			[	]2
	]2
		INPUT TO ΔG		REL LEVEL
COMPRESSION		AND RECT		EXPANDOR
	IN			OUT
	(COMPRESSOR		(EXPANDOR
A	OUT)			IN)	D
		B		C

TRANSMISSION

MEDIUM

ABS LEVEL

DBdBM

+16.0	+10.68
+12.0	+6.68

0.0-5.32

-20	-25.32
-40	-45.32
-60	-65.32
-80	-85.32

SL00653

Figure 25. NE570/571/SA571 System Level

			+5V
	A
CS	4	10mV
	R
	+
	±		+
			±
IO	10k		100k
		1k	Rt
			R1
	2/3 VCC

+VCC

+5V	+	+5V
		RT
1.0	±		+
		CT	±
			5k

1V

1k

SL00654

Figure 26. Fiber Optic Data Receiver

1991 Oct 16