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| HA17301P |
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6 page 
HA17301P 6 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. − + − + C1 0.001 µF Vout1 Vout2 100 k Ω V + R1 1 M Ω VRE R2 500 k Ω R3 I − I + R4 1 M Ω R5 120 k Ω V + Figure 4 Triangular Wave Oscillator VOH VOL V02 I + I t −n TOH TOL Figure 5 Triangular Wave Generator Operation TOL = C1 R1 R3 VOH R5 (V + − V BE) (3) TOH = C1 R3 V + VOH R2 V+ − V BE R1 R5 − (4) Here, if R 1 = 2·R2, VOH = V +, and V+ > V BE, then: TOH + TOL = 2C1 R1 R3 R5 (5) |
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