H - Electricity – 03 – M
Patent
H - Electricity
03
M
354/70
H03M 1/12 (2006.01) H03M 3/02 (2006.01)
Patent
CA 1289250
ABSTRACT OF THE DISCLOSURE: Besides an input switched capacitor (14) for sampling an input analog signal into output electric charges, an oversampling analog-to-digital converter comprises an additional switched capacitor (47) for sampling, into additional electric charges in synchronism with the input switched capacitor, controlled electric charges produced by a capacitor array (24) which is coupled to a reference voltage source (23) and is controlled by a predetermined number of control signals produced by a control logic (22) in response to an output digital signal. A summing circuit delivers the output and the additional electric charges to an integrator (15) connected to a quantizer (21) which produces a quantized signal substantially identical with the digital signal. Preferably, the summing circuit comprises a connecting switch (49) for supplying the output and the additional electric charges to the integrator in synchronism with the input and the additional switched capacitors. A switch array (25) is controlled by the control signals to make the capacitor array produce the controlled electric charges.
563605
Corporation Nec
Smart & Biggar
LandOfFree
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