Fairchild 2N4123 manual Typical Characteristics continued, Noise Figure vs Frequency

NPN General Purpose Amplifier

(continued)

Typical Characteristics (continued)

2N4123

Noise Figure vs Frequency

	12	I C = 1.0 mA
				V CE = 5.0V
(dB)	10	R S = 200Ω
		I C = 50 ∝ A
FIGURE
	8	R S = 1.0 kΩ
	6	I C = 0.5 mA
		R S = 200Ω
NOISE
	4
-
NF	2	I C = 100 ∝		A, R S = 500 Ω
	0	1	10	100
	0.1

f - FREQUENCY (kHz)

Noise Figure vs Source Resistance

	12
		I C = 1.0 mA
(dB)	10
		I C = 5.0 mA
FIGURE	8
			I C= 50 ∝ A
	6
NOISE
	4		I C= 100 ∝ A
-
NF	2
	0	1	10	100
	0.1
		R S - SOURCE RESISTANCE ( kΩ		)

Current Gain and Phase Angle

vs Frequency

	50			0
(dB)	45	h fe		20
	40			40
CURRENT GAIN					θ - DEGREES
	35			60
	30			80
	25		θ	100
	20			120
	15	V CE = 40V		140
-	10			160
fe
	5	I C = 10 mA		180
h
	0	10	100	1000
	1

f - FREQUENCY (MHz)

Power Dissipation vs

Ambient Temperature

	1
(W)				SOT-223
DISSIPATION	0.75
		TO-92
	0.5
POWER		SOT-23
	0.25
-
P
	0	25	50	75	100	125	150
	0

TEMPERATURE (o C)

Turn-On Time vs Collector Current

	500	I c
		IB1 = IB2 = 10
		40V
(nS)	100	15V
		t r @ V CC = 3.0V
TIME
	2.0V
	10	t d @ VCB = 0V
	5
		10	100
	1
	I C	- COLLECTOR CURRENT (mA)

Rise Time vs Collector Current

	500			I c
		VCC = 40V	IB1 = IB2
				=
				10
(ns)	100
TIME		T J = 25°C
		T J = 125°C
- RISE
r
t
	10
	5	10		100
	1
	I C	- COLLECTOR CURRENT (mA)