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Analog-to-digital converter circuit e.g. for computer tomograpy has logic circuit which detects number of times charge is removed from integrating capacitor
Analog-to-digital converter circuit e.g. for computer tomograpy has logic circuit which detects number of times charge is removed from integrating capacitor
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机译:模数转换器电路例如用于计算机层析成像的逻辑电路可检测从积分电容器中移除电荷的次数
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摘要
The circuit includes an operational amplifier (46) with an integrating capacitor (44). A charge subtracting circuit (36) is selectively coupled to the inverting input (47) and the output (49) of the operational amplifier. A digital logic circuit (66) tracks the number of times a charge is removed from the integrating capacitor by the charge subtraction circuit. A residue quantization circuit detects a residual charge in the integrating capacitor, and provides an additional output bit accordingly. Independent claims are included for further analog-digital converter circuits and a method of converting an analog input signal into a number of binary output bits.
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