The most common interpolation method are the following: time to amplitude conversion method (time-to-amplitude converter), time stretch method (time-stretching) and transmission delay (propagation delay). 4.1 Time-to-Digital converter plug complement the method of transmission delay method is a fully digital timing, which uses the phenomenon of time delay in signal transmission through the electronic components and wiring must do as a means of measuring short time. Figure 4.2 is a The basic structure diagram of the delivery delay circuit, the output logic state as the input to change the logic buffer gate (logic buffer) as the delay with the basic components, labeled in the diagram (4.2) (b) B 1 ... B n, D flip-flop is used to a record to change the number of logic gates in the state. In the figure, a buffer gate and a D flip-flop composed of a delay element.
Characteristics of the inductor is to prevent changes in the current, the inductor will generate an EMF induction set to gradually increase as the current is gradually reduced, the voltage continued to rise from a point b, the voltage reaches the maximum and the current 11 to zero mutation, known by the formula V = L, di, reaching the maximum voltage change point from b to a dt period of time determined by the closing time of the transistor from Figure 3.4 (a) b current is equal to 0. This is because this time, transistor fully off transistor cut-off time is from point a to point b of this period of time. As already mentioned, selected in the experiment 3DK9 completely cut-off time is about 15 microseconds. select transistor, it should be the closing time of the transistor is as short as possible. Here will present the performance introduction of cell phone jammer .
This will not only get larger peak voltage, and will avoid the current flowing through the transistor's time is too long while the loss of power can be seen, due to characteristics of the inductor flows through the inductor current to zero, due to the inductor current mutation characteristics, the current will continue to decline (reverse), this time, the voltage across the inductor also began to decline until the point c, the voltage began to reverse, that is to produce a certain shock, but due to the circuit using The half-wave rectifier circuit consisting of two diodes, although the shock current is relatively large, but because of the relationship of the diode D3, to make C-level voltage does not lower than-0.7V can be seen from Figure 3.4 (b). cell phone jammer can help the customer fully make use of the five fingers.Especially for the small power type cell phone jammer
After point c, the voltage in turn reverse change will reach the state of negative positive at this time because of the diode D2 reverse biased, so it will not impact the final output voltage should be noted here should be selected reverse breakdown voltage of the diode. Figure 3.4 transistor turn-on, the end of the waveform 12 in Figure 3.5 the inductor current curve Of course, when the inductor current reaches the saturation voltage amplification effect as shown in Figure 3.5, the choice of saturation when the inductor current reaches the saturation current of 200mA inductor, we can see. The distance of remote control of cell phone jammer is 15m.
No comments:
Post a Comment