Sgs-thomson Microelectronics S.r.l.

Sgs-thomson Microelectronics S.a.

Loic Lietar

Maurizio Zuffada

Giorgio Betti

Gianfranco Vai

Fabrizio Sacchi

Silvano Gornati

Mauro Merlo

Jean-Luc Jaffard

Michel Mouret

A counter/divider dividing an input frequency (F1) by 2.sup.q+n +1/2, comprises a first divider by 2.sup.q (30) receiving the signal to divide of a frequency F1 and provides 2.sup.q+1 outputs at the frequency F1/2.sup.q out of phase the ones to the others of 360.degree./2.sup.q+1 ; a multiplexer (32) having a control terminal (34) and sequentially providng at its output (33) each of said 2.sup.q+1 outputs each time a control signal is applied; and a second divider by 2.sup.n (31) receiving the output (33) of the multiplexer and providing the desired output (34) of the counter/divider, this output being applied to the control terminal of the multiplexer.

Fast counter/divider and its use in a swallower counter

A broad operational range, automatic device for the change of frequency in the horizontal deflection of multi-synchronization monitors comprises an integrated circuit incorporating,

Broad operational range, automatic device for the change of frequency in

An electronic comparator device with hysteresis, being of a type which comprises a differential cell having a signal input, an output, and a threshold input, further comprises a second differential cell having one input connected to said output and the other input connected to a controlling circuit portion which has an output connected to the threshold input to reduce the threshold voltage value stepwise on the first change-over of the output of the comparator.

Electronic comparator device with hysteresis

Growing community of inventors

Paris, France

Loic Lietar