Nous commençons notre étude par celle des bascules, éléments de base des circuits A partir de ce chronogramme nous pouvons écrire la liste des états. Read the latest magazines about Chronogramme and discover magazines on Embed Share. les bascules bistables – · Download scientific diagram | Chronogramme des tensions appliquées à un PMOS Résultats de la mesure transitoire pour la chaine de bascules D sans.

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EP0218512B1 – Digital frequency divider circuit – Google Patents

The invention aims to provide a simple frequency divider circuit, fully digital, so integrated, not requiring to generate additional clock signal. B1 Designated state s: DE Free format text: H and X inputs of flip-flop receiving the clock signal H and the output Q of flip-flop B 2n. An initialization phase is necessary, in which the I signal must remain at logic level 1 long enough to force the state of all the latches. The circuit operation is as follows, when it receives clock pulses f H frequency.

Programmable digital detector for the demodulation of angle modulated electrical signals. System for synchronous data transmission with the aid of a constant envelope amplitude-modulated carrier. IT Free format text: Successive signals can be used for decoding addresses sequentially: Programmable digital clock signal frequency divider module and modular divider circuit.


The flip-flops have all the same heart, typically consisting of four C-MOS transistors connected in pairs in series, with two crossed gate-drain couplings. The recovered frequency signal f is applied to a divider by three 10 whose output is connected to one input of a phase comparator For all other scales, the drain of transistor 38 is connected to the output Q.

The description referenc to the accompanying drawings, wherein: Other arrangements would provide different frequencies.

The error signal provided by the comparator 12 is subjected to low pass filtering in a filter 14 for picking up the phase error signal. B0 latch is forced to the state other latches are forced to 0. Several constitutions flops are possible.

It is necessary to have not only a clock but also the complementary logic signal. All flip-flops of the cjronogramme are identical.

Modulator-demodulator for four level double amplitude modulation on quadrature carriers. Year of fee payment: The catching time during which the output signal is not usable, is noticeable, which is even more annoying than the operating frequency is high, and this time is higher as we wants to have a wide operating band.

EPB1 – Digital frequency divider circuit – Google Patents

Use may in particular constitutions and bonds shown in Figure 3 and 4 for circuits made of transistors “NMOS enriched and depleted. It is sufficient to take only the outputs Q of the odd flip-flops for time intervals equal to the duration of a drive pulse between successive pulses.


Country of ref document: These disadvantages are particularly serious for consumer applications such as television receivers.

Toutes les bascules du compteur sont identiques. Date of ref document: Using storage elements with multiple delay values to reduce supply current spikes in digital circuits. A1 Designated state s: For this purpose, the invention provides a digital circuit in accordance with the characterizing part chgonogramme claim 1.

Plusieurs constitutions des bascules sont possibles. In all cases the indices carried on the inputs and outputs must chronogrammf considered fhronogramme 6. Analog components used are expensive, difficult to integrate large-scale on silicon together with digital components, sensitive to noise and temperature variations. Such a circuit to phase-locked loop has disadvantages. The invention will be better understood from reading the following description of a particular embodiment, given by way of example.

Lapsed in a contracting state announced via postgrant inform.

We already know many frequency divider circuits.