Fujitsu MB3887 manual Error amplifier gain and phase vs. Frequency Gain a

MB3887

Error amplifier gain and phase vs. Frequency

	40
V (dB)	20
	0
Gain A
	−20
	−40

1 k

				Ta = +25 °C		180
			AV
	φ
						90	φ (deg)
						0
						−90	Phase
						−180
10 k		100 k		1 M	10 M

Frequency f (Hz)

				VCC = 19 V
		4.2 V
10 kΩ			240 kΩ
	10 kΩ
1 ∝F
+		8
	2.4 kΩ		−
IN		(4)
				7
		9	+	(5) OUT
10 kΩ	10 kΩ	(3)		Error Amp1
				(Error Amp2)

Error amplifier gain and phase vs. Frequency

	40
(dB)	20
AV	0
Gain	−20
	−40

1 k

				Ta = +25 °C			180
			AV
	φ
							90	φ (deg)
							0
							−90	Phase
							−180
10 k		100 k			1 M	10 M

		4.2 V			VCC = 19 V
10 kΩ		10 kΩ	240 kΩ
1 ∝F
+		16		−
	2.4 kΩ
IN		22		+	15
				+		OUT
10 kΩ	10 kΩ				Error Amp3
			4.2 V

Gain AV (dB)

Frequency f (Hz)

Current detection amplifier gain and phase vs. Frequency

40

Ta = +25 °C

180

VCC = 19 V

AV

13

+

20

90

φ (deg)

(24)

⋅20

10

φ

12

−

(2)

OUT

(1)

Current Amp1

0

0

(Current Amp2)

Phase

12.6 V

12.55 V

−20

−90

−40

−180

1 k

10 k

100 k

1 M

10 M

Frequency f (Hz)

(Continued)

14