Abstract: Electronic circuit for the analog-to-digital conversion of the alternative current (AC) component of an analog input signal. The electronic circuit has a coupling device with an input and an output coupling device delivers at its output an analog AC signal when the analog input signal is applied to the input. An analog-to-digital converter converts the analog AC signal into a digital output signal. A feedback loop has a digital-to-analog converter for converting the digital output into an analog feedback signal, the feedback loop being coupled to the coupling device, and the feedback loop has a first feedback path comprising a switched capacitor.

Abstract: Electronic circuit designed to control the level of lighting produced by light diodes in a flat screen. The circuit uses a PDM modulator in order to generate a control signal (Vc) with a number of pulses by period that depends on the desired level of lighting. The advantage is to reduce the energy in the low frequencies.

Abstract: Phase locked loop circuit (105) having a double entry VCO (158) and two independent charge pumps (171, 172), each connected with one of the entries of the VCO. Each of the VCO entries has a different gain coefficient, thereby allowing a better optimisation and control of the device bandwidth and a reduced phase noise. Can be employed in radio transmitters and/or receivers and allows simultaneous and precise FM modulation both inside and outside the PLL bandwidth.

Abstract: A control module (1) having the following elements: a read-only memory (ROM 2), a temporary buffer (6), into which the data of said ROM (2) can be transferred in order to be accessible from outside the control module, a read controller (3), for selecting at each cycle the portions of said ROM transferred into said temporary buffer, wherein the portions selected by said read controller (3) depend on the contents of said ROM. One advantage of the invention is the reduction of the electric consumption, since the ROM does not have to be read when the data are already available in the temporary buffer.