| 摘要 |
1,096,070. Analogue-to-digital converters. INTERNATIONAL STANDARD ELECTRIC CORPORATION. June 2, 1965 [June 3, 1964 (2)], No. 23482/65. Heading G4H. An analogue-to-digital converter is of the balancing type which applies pulses to other than the least significant stage of a counter in response to the comparison and applies one or more correction pulses to the least significant stage. In the particular embodiment, pulses are fed to a count up or count down input of the next to lowest stage (or a higher stage) of a five-stage binary counter preset to 10,000, until a feedback voltage from a resistor network energized by the counter stages exceeds the analogue input which is stored on a capacitor, the direction of counting being determined by the polarity of the analogue input. If the feedback voltage then exceeds the analogue input voltage by more than the voltage corresponding to a count of one, as determined by a differential amplifier, a pulse (or pulses) is fed to the lowest counterstage to decrement the counter by one (or more). |
