SIGNAL PROCESSING DEVICE, DIGITAL OUTPUT MICROPHONE UNIT
PROBLEM TO BE SOLVED: To stabilize fluctuation of digital output to ambient temperature change within a wide temperature range. SOLUTION: In a signal processing device (13) which converts analog electric signals converted from sound by a microphone (1) to digital signals, and outputs them, the devic...
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| creator | MASAI SHIGEO |
| description | PROBLEM TO BE SOLVED: To stabilize fluctuation of digital output to ambient temperature change within a wide temperature range. SOLUTION: In a signal processing device (13) which converts analog electric signals converted from sound by a microphone (1) to digital signals, and outputs them, the device is provided with a preamplifier (15) for amplifying the analog electric signals output from the microphone (1), an analog-digital convertor (12) for comparing the analog electric signals output from the preamplifier (15) with a reference voltage (Vref) for converting the signals from analog to digital, and a reference voltage generation circuit (14) for generating the reference voltage (Vref) and supplying the voltage to the analog-digital convertor (12). The reference voltage generation circuit (14) is provided with an element having a higher temperature dependency in terms of an electric property, compared to other electric circuit elements among electric circuit elements constituting the signal processing device (13), and generates a reference voltage (Vref) corresponding to the voltage between both terminals of the element. COPYRIGHT: (C)2011,JPO&INPIT |
| format | Patent |
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SOLUTION: In a signal processing device (13) which converts analog electric signals converted from sound by a microphone (1) to digital signals, and outputs them, the device is provided with a preamplifier (15) for amplifying the analog electric signals output from the microphone (1), an analog-digital convertor (12) for comparing the analog electric signals output from the preamplifier (15) with a reference voltage (Vref) for converting the signals from analog to digital, and a reference voltage generation circuit (14) for generating the reference voltage (Vref) and supplying the voltage to the analog-digital convertor (12). The reference voltage generation circuit (14) is provided with an element having a higher temperature dependency in terms of an electric property, compared to other electric circuit elements among electric circuit elements constituting the signal processing device (13), and generates a reference voltage (Vref) corresponding to the voltage between both terminals of the element. 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SOLUTION: In a signal processing device (13) which converts analog electric signals converted from sound by a microphone (1) to digital signals, and outputs them, the device is provided with a preamplifier (15) for amplifying the analog electric signals output from the microphone (1), an analog-digital convertor (12) for comparing the analog electric signals output from the preamplifier (15) with a reference voltage (Vref) for converting the signals from analog to digital, and a reference voltage generation circuit (14) for generating the reference voltage (Vref) and supplying the voltage to the analog-digital convertor (12). The reference voltage generation circuit (14) is provided with an element having a higher temperature dependency in terms of an electric property, compared to other electric circuit elements among electric circuit elements constituting the signal processing device (13), and generates a reference voltage (Vref) corresponding to the voltage between both terminals of the element. 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SOLUTION: In a signal processing device (13) which converts analog electric signals converted from sound by a microphone (1) to digital signals, and outputs them, the device is provided with a preamplifier (15) for amplifying the analog electric signals output from the microphone (1), an analog-digital convertor (12) for comparing the analog electric signals output from the preamplifier (15) with a reference voltage (Vref) for converting the signals from analog to digital, and a reference voltage generation circuit (14) for generating the reference voltage (Vref) and supplying the voltage to the analog-digital convertor (12). The reference voltage generation circuit (14) is provided with an element having a higher temperature dependency in terms of an electric property, compared to other electric circuit elements among electric circuit elements constituting the signal processing device (13), and generates a reference voltage (Vref) corresponding to the voltage between both terminals of the element. COPYRIGHT: (C)2011,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BASIC ELECTRONIC CIRCUITRY CODE CONVERSION IN GENERAL CODING DEAF-AID SETS DECODING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS |
| title | SIGNAL PROCESSING DEVICE, DIGITAL OUTPUT MICROPHONE UNIT |
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