Apparatus and method for digital to analog signal conversion using an analog to digital signal converter
First Claim
Patent Images
1. A digital to analog signal converter comprised of:
- a processor portion including a first processor input for receiving a first digital signal, and a processor output for transmitting a second digital signal, said processor portion further sampling said first digital signal and controlling said second digital signal in response thereto;
a low pass filter portion having a filter input for receiving said second digital signal and a filter output for transmitting an analog signal;
an analog to digital converter portion having a converter input for receiving said analog signal and a converter output for transmitting said first digital signal to said processor portion.
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Abstract
A digital to analog signal converter apparatus for converting digital signals to analog signal outputs. The converter apparatus includes a microprocessor, a low pass filter portion for converting a digital output signal from the microprocessor to an analog output signal, and an analog to digital converter portion for sampling and converting the analog output signal to provide a digital input to the microprocessor, permitting control of the analog output signal.
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Citations
14 Claims
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1. A digital to analog signal converter comprised of:
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a processor portion including a first processor input for receiving a first digital signal, and a processor output for transmitting a second digital signal, said processor portion further sampling said first digital signal and controlling said second digital signal in response thereto; a low pass filter portion having a filter input for receiving said second digital signal and a filter output for transmitting an analog signal; an analog to digital converter portion having a converter input for receiving said analog signal and a converter output for transmitting said first digital signal to said processor portion. - View Dependent Claims (2)
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3. A digital to analog signal converter having an analog voltages output of zero volts on startup, said digital to analog signal converter comprised of:
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a microprocessor having a plurality of inputs and outputs, said microprocessor including a first processor input for receiving a first digital signal, a second processor input for receiving a power supply voltage, and a first processor output for transmitting a second digital signal, said microprocessor further including means for processing said first digital signal; a low pass filter portion comprising means for receiving said second digital signal and transmitting an analog signal, said low pass filter portion means including a resistor and a capacitor, said resistor having a resistor input connected to said first processor output, a resistance value R, and a resistor output, and said capacitor having a capacitor input connected to said resistor output and a capacitance value C; and means for converting said analog signal to said first digital signal comprised of an analog to digital signal converter device, said analog to digital signal converter device having a converter input for receiving said analog signal and a converter output for transmitting said first digital signal, said analog to digital signal converter device further having a resolution of signal conversion N in the range of 8 bit to 10 bit accuracy. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. A digital to analog signal converter having an analog voltage output of zero volts on startup, said digital to analog signal converter comprised of:
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a microprocessor having a plurality of inputs and outputs, said microprocessor including a first processor input for receiving a first digital signal, a second processor input for receiving a power supply voltage, and a first processor output for transmitting a second digital signal, said microprocessor further including means for processing said first digital signal; software means for controlling said microprocessor processing means, said software controlling means including means for comparing said first digital signal to and determining deviation from a target condition and means for altering said second digital signal in response to said deviation from the target condition; a low pass filter portion comprising means for receiving said second digital signal and transmitting an analog signal, said low pass filter portion means including a resistor and a capacitor, said resistor having a resistor input connected to said first processor output, a resistance value R, and a resistor output, said resistor output further comprising said analog output of said digital to analog signal converter, and said capacitor having a capacitor input connected to said resistor output and a capacitance value C; and means for converting said analog signal to said first digital signal comprised of an analog to digital signal converter device, said analog to digital signal converter device having a converter input connected to said analog output for receiving said analog signal and a converter output connected to said first processor input for transmitting said first digital signal to said microprocessor. - View Dependent Claims (11, 12)
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13. A method of converting a digital signal to an analog signal comprised of:
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receiving a first digital signal in a first processor input of a microprocessor; transmitting a second digital signal from a first processor output of said microprocessor; receiving said second digital signal in a low pass filter portion; transmitting an analog signal from said low pass filter portion; receiving said analog signal in an analog to digital signal converter device; converting said analog signal to said first digital signal in said analog to digital signal converter device; transmitting said first digital signal from said analog to digital converter device to said microprocessor; comparing said first digital signal to a target condition; and determining deviation of said first digital signal from said target condition. - View Dependent Claims (14)
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Specification