Pulse signal drive circuit
First Claim
Patent Images
1. A pulse signal drive circuit, comprising:
- a source of energy;
an energy storage device, coupled to the energy source, for receiving a substantially constant flow of energy from the energy source; and
a switch circuit, coupled to the energy storage device, for drawing repetitive pulses of substantially constant energy from the energy storage device to generate corresponding pulse signals.
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Abstract
A pulse signal drive circuit includes an energy storage device. A source of energy supplies a substantially constant flow of energy to the energy storage device. A switch circuit draws repetitive pulses of substantially constant energy from the energy storage device to generate corresponding pulse drive signals.
42 Citations
25 Claims
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1. A pulse signal drive circuit, comprising:
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a source of energy;
an energy storage device, coupled to the energy source, for receiving a substantially constant flow of energy from the energy source; and
a switch circuit, coupled to the energy storage device, for drawing repetitive pulses of substantially constant energy from the energy storage device to generate corresponding pulse signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. In an SpO2 patient monitoring system including at least one LED for producing optical pulse signals, a pulse signal drive circuit coupled to the LED and comprising:
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a controllable current source;
a capacitor, coupled to the controllable current source, for receiving a substantially constant current from the current source; and
a switch circuit, coupled to the capacitor and the LED for drawing repetitive pulses of substantially constant current from the capacitor, and providing the pulses to the LED to condition the LED to produce optical pulse signals. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for producing a pulse drive signal, comprising the steps of:
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supplying a substantially constant flow of energy to an energy storage device; and
drawing repetitive pulses of substantially constant energy from the energy storage device to generate corresponding pulse drive signals. - View Dependent Claims (24, 25)
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Specification