Electronic interface device between a sensor and a display unit
First Claim
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1. An electronic interface device for use between a sensor detecting a physical magnitude and providing an analog output signal representative thereof and a display unit for displaying a value of said physical magnitude, said interface device comprising:
- a clock means for providing at least a first clock signal;
a controllable generator for providing an analog output signal to control said display unit in accordance with a signal supplied thereto representative of a value to be displayed, said controllable generator having a control input for controlling an increase and decrease in said analog output signal thereof;
a first up-down counter for receiving and counting said first clock signal and for providing a binary sign output signal to said control input of said generator; and
an analog amplitude comparator for comparing said analog output signal of said generator with said analog output signal of said sensor and for providing an output signal which control the direction of up and down counting of said first clock signal by said first up-down counter.
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Abstract
An electronic interface device is provided for use between a sensor and a display unit, including a controllable generator which delivers a signal to the display unit and is connected to an input of a comparator whose other input receives the output signal of the sensor. The output of the comparator controls the up counting or the down counting of an up-down counter of clock pulses. The sign output of the up-down counter controls the generator.
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Citations
19 Claims
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1. An electronic interface device for use between a sensor detecting a physical magnitude and providing an analog output signal representative thereof and a display unit for displaying a value of said physical magnitude, said interface device comprising:
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a clock means for providing at least a first clock signal; a controllable generator for providing an analog output signal to control said display unit in accordance with a signal supplied thereto representative of a value to be displayed, said controllable generator having a control input for controlling an increase and decrease in said analog output signal thereof; a first up-down counter for receiving and counting said first clock signal and for providing a binary sign output signal to said control input of said generator; and an analog amplitude comparator for comparing said analog output signal of said generator with said analog output signal of said sensor and for providing an output signal which control the direction of up and down counting of said first clock signal by said first up-down counter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification