HA17301P Datasheet, PDF(6/14 Page) Hitachi Semiconductor

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HA17301P Datasheet, PDF (6/14 Pages) Hitachi Semiconductor – Quad Operational Amplifier

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HA17301P

Triangular Wave oscillator

Triangular waveforms are usually acquired by integrating an alternating positive and negative DC voltage.

Figure 4 shows the relation between the input and output in this circuit.

V+

0.001 ÂµF

1 Mâ¦ VRE

Vout1

R3 100 kâ¦

Iâ

R2 500 kâ¦

V+

I+

1 Mâ¦

120 kâ¦

Figure 4 Triangular Wave Oscillator

Vout2

VOH

V02

I+

VOL

TOL

tân

TOH

Figure 5 Triangular Wave Generator Operation

TOL =

C1 R1 R3 VOH

R5 (V+ â VBE)

(3)

TOH =

C1 R3 V+

VOH

V+

VBE

(4)

Here, if R1 = 2Â·R2, VOH = V+, and V+ > VBE, then:

TOH + TOL =

2C1 R1 R3

(5)

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