SU1200398A1 - Generator of voltage pulses based on capacitive element - Google Patents

Description

The invention relates to a pulse technique and can be used in radio devices for various purposes, in particular when modulating light using electro-optical crystals.

The purpose of the invention ¹ is to reduce

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energy losses by optimal matching of the impulse pulse and the capacitive element with a significant change in the charge and discharge rate of the capacitive element. The drawing shows a circuit diagram of a voltage pulse shaper on a capacitive element.

The voltage pulse shaper on the capacitive element 1 contains the first pulse amplifier 2, the output 3 of which is connected to one output of the first serial QF circuit 4 and to one output of the first resistor 5, the other output of which is connected to one output of the capacitive element through the first parallel LC circuit 1. A second pulse amplifier 7 is introduced into the device, the output 8 of which is connected to one output of the second serial QB circuit 9 and to one output of the second resistor 10, the other output of which through the second parallel LC circuit 11 connected to the positive pole of the voltage source 12, the negative pole of which is connected to one output of the capacitive element 1, the first diode 13, the cathode of which is connected to another Output of the first resistor 5, and the anode to one output of the capacitive element 1, the second diode 14, the anode of which is connected with the other output of the second resistor 10, and the cathode with the positive pole of the voltage source 12, the third diode Ϊ5 and the fourth diode 16, the anode of the diode 15 is connected to another output of the first Q-circuit 4, the cathode of the diode 16 - with a different output of the second Q-circuit 9 , cathode, diode 15 and ano Diode 16 - to the other terminal of the capacitive element 1.

The device works as follows.

In the initial state, the capacitive element 1 is discharged, the diode 16 is closed by the voltage source 12, the current through the amplifier 7 does not flow, the potential at the output 8 is equal to the voltage of the source 12.

When forming a positive voltage drop at the output 3 of the amplifier 2, the diode 15 opens and the capacitive element 1 starts charging through the Q circuit. 4. As soon as the voltage on the capacitive element 1 reaches the maximum value, the positive pulse at the output 3 of the amplifier 2 ends, the diode 15 closes, the potential difference on the plates of the capacitive element.1 is fixed at a constant level. The negative voltage drop across the HC circuit 6 is eliminated by the diode

13, which prevents the appearance of the reflected signal at the output 3 of the amplifier 2.

During the formation of a negative voltage drop (equal in amplitude to the voltage of source 12) at the output 8 of the amplifier 7, a diode 16 is opened and the capacitive element 1 is discharged through the Q circuit 9. As soon as the voltage on the capacitive element 1 drops to the minimum value, a negative output pulse 8 the amplifier 7 ends, the diode 16 is closed, the potential difference on the plates of the capacitive element 1 is fixed at a constant level. Positive voltage drop across HC circuit 11 is limited by a diode

14, which prevents the appearance of the reflected signal at the output 8 of the amplifier 7.

The parameters of the Q-circuit 4, resistor 5, LC circuit 6 are selected so that the equivalent electrical resistance of the combination of these elements from the output 3 of the amplifier 2 remains constant even with a significant change in the charge rate of the capacitive element 1.

In turn, the parameters of the Q-circuit 9, resistor 10, EC-circuit 11 are selected so that the equivalent electrical resistance of the combination of these elements from the output 8 of the amplifier 7 is kept constant even with a significant change in the discharge rate of the capacitive element 1.

Thereby, an optimal matching is achieved in the power of the pulsed amplifier 2 with the capacitive element 1 (when the element is charged)

) 200398

pulse amplifier 7 with a capacitive element 1 ^ at the discharge of the element)), which ensures the reduction of energy losses during the formation of voltage pulses on the capacitive element I.

Claims (1)

FORMER OF VOLTAGE PULSES ON CAPACITIVE ELEMENT, containing the first impulse amplifier, the output of which is connected to one output of the first Q-circuit and one output of the first resistor, the other output of which is connected to the output of a capacitive element through the first parallel C-circuit, characterized in that in order to reduce energy losses, the second pulse amplifier is introduced into it, the output of which is connected to one output of the second serial QB circuit and to one output of the second resistor, the other output of which is connected via a second parallel LC circuit to the positive pole of the voltage source, the negative pole of which is connected to one the output of a capacitive element, the first diode, the cathode of which is connected to another output of the first resistor, and the anode - with one output of the capacitive element, the second diode, the anode of which is connected to another output of the second the resistor, and the cathode with the positive pole of the voltage source, the third and fourth diodes, the anode of the third diode is connected to another output of the first Q circuit, the cathode of the fourth diode to another output of the second Q circuit, the cathode of the third diode and the fourth diode the output of the capacitive element. zi ,,,, 1200398 1200398