HA5025_03 Datasheet, PDF (5/15 Pages) Intersil Corporation – Quad, 125MHz Video Current Feedback Amplifier

HA5025
Test Circuits and Waveforms (Continued)
NOTE:
12. A series input resistor of ≥100Ω is recommended to limit input currents in case input signals are present before the HA5025 is powered up.
Vertical Scale: V_IN = 100mV/Div., V_OUT =
100mV/Div.
FIGURE 4. SMALL SIGNAL RESPONSE
Schematic Diagram (One Amplifier of Four)
Vertical Scale: V_IN = 1V/Div., V_OUT = 1V/Div.
Horizontal Scale: 50ns/Div.
FIGURE 5. LARGE SIGNAL RESPONSE
V+
R₂
R₅
800
2.5K
Q_P1
Q_N5
R₁
60K
Q_N1
R₃
6K
Q_P2
Q_N6
Q_P4
R₁₀
820 ^QP8
Q_P5
R₁₁
1K
Q_N8
Q_P6
R₁₂
280
+IN
Q_P9
R₁₅
400
Q_P11
R₁₉
400
Q_P14
Q_P10
R₁₇ R₁₈
280 280
R₂₄
140
Q_N12
Q_P12
R₂₀
140
C₁
1.4pF
Q_P15
R₂₉
R₂₇
9.5
200
Q_P19
R₃₁
5
Q_P16
Q_P20
R₂₈
20
-IN
Q_N13
Q_P13
C₂
1.4pF
Q_P17
Q_N17
R₂₅
20
Q_N2
D₁
Q_N4
Q_N3
R₄
R₃₃
800 800
V-
Q_P7
R₁₃
Q_N7
1K
R₉
820 Q_N9
Q_N10
R₁₄
280
Q_N14
R₁₆
400
Q_N11
Q_N15
R₂₁
140
R₂₂
R₂₅
280
140
Q_N16
R₂₃
400
Q_N18
R₂₆
200
Q_N19
Q_N21
R₃₂
5
R₃₀
7
OUT
5