Double integration, delta-sigma, analog-digital coder

Details Double integration, delta-sigma, analog-digital coder Double integration, delta-sigma, analog-digital coder

H - Electricity

03

M

354/69

H03M 3/02 (2006.01) H04B 14/06 (2006.01)

Patent

CA 1224877

ABSTRACT OF THE DISCLOSURE The invention relates to a double integration or dual slope delta-sigma coder. This coder comprises a first adder receiving on an input a signal E(p) to be encoded and on an input the coded signal (Sp), a first integrator receiving on an input an output signal of the first adder, a second adder receiving on an input the output signal of the first integrator, an input of the second adder receiving a signal proportional to the coded signal, a second integrator connected to the second adder, a quantizer circuit, whereof one input (D) is connected to an output of the second integrator, an output Q of said quantizer circuit supplying the coded signal S(p), wherein the integrators and adders are constituted by circuits comprising operational amplifiers and switched capacitor arrangements. Application to a PCM transmission channel, to the measurement of d.c. voltages and to analog-digital coding.

437214

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