Flutter reduction apparatus and method
First Claim
Patent Images
1. A tachometer circuit comprising:
- a tachometer; and
a flutter reduction circuit electrically coupled to and driving said tachometer, said flutter reduction circuit generating a voltage to cancel ripple voltages.
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Abstract
A tachometer circuit including a flutter reduction circuit and a tachometer is described. The tachometer circuit cancels pointer flutter in the tachometer without adversely affecting pointer response.
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Citations
16 Claims
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1. A tachometer circuit comprising:
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a tachometer; and
a flutter reduction circuit electrically coupled to and driving said tachometer, said flutter reduction circuit generating a voltage to cancel ripple voltages. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A flutter reduction circuit for use with a tachometer, said flutter reduction circuit comprising:
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a high pass filter circuit; and
a driver circuit electrically coupled to said high pass filter circuit, said high pass filter circuit passing unwanted input signals to a first circuit within the driver adapted to cancel out the signals and said high pass filter circuit generating a voltage to cancel ripple voltages. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A tachometer circuit comprising:
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means for inputting a pulsed ignition signal;
means for converting the pulsed ignition signal to a voltage;
means for converting the voltage into a first signal; and
means for canceling pointer flutter in a tachometer using the first signal.
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15. A method of operating a tachometer circuit, said method comprising:
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inputting a pulsed ignition signal;
converting the pulsed ignition signal to a voltage;
converting the voltage into a first signal; and
canceling pointer flutter in a tachometer using the first signal. - View Dependent Claims (16)
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Specification