| 31. | In this application, the sum and difference of two input voltages are formed using operational amplifiers.
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| 32. | The positive feedback is introduced by adding a part of the output voltage to the input voltage.
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| 33. | If the input voltage approaches the desired output voltage, the regulator will " drop out ".
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| 34. | The gain of the vertical amplifier can be adjusted to suit the amplitude of the input voltage.
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| 35. | Increasing the input voltage increases the rate of charging the capacitor, decreasing the time between switching events.
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| 36. | At low input voltage, the TTL input sources current which must be absorbed by the previous stage.
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| 37. | The circuit is insensitive to the input voltage variations and the transistor stays firmly in active linear region.
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| 38. | All linear regulators require an input voltage at least some minimum amount higher than the desired output voltage.
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| 39. | Input voltage may be, for example, 115 kV, or whatever is common in the area.
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| 40. | It is an inverting converter, so the output voltage is negative with respect to the input voltage.
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