SU412561A1 - PULSE VOLTMETER - Google Patents

Description

This invention relates to a radio measuring technique. A pulsed voltmeter is known that contains an input device whose output is connected to one of the inputs of an amplitude-time converter (AVP) blocking circuit made of a trigger, the outputs of which are connected to the inputs of a key and a pulse shaper, and the output of an amplitude-time converter blocking circuit is connected to an amplitude input -time converter, and the reading device. However, in a known voltmeter, the key in the WUA input blocking circuit opens out of sync with the input pulses. As a result, it may turn out that at the moment of opening the key, and thus the WUA entry, a pulse will act at the instrument input. Then the device will measure the amplitude of that part of the impulse that is still at the input of the WUA. This will result in additional measurement error. The purpose of the invention is to reduce the gaps caused by the non-synchronism of the key operation during the action of pulses at the instrument input. To achieve this goal, an amplifier, a measurement mode switch, a control unit and an OR circuit have been entered into the amplitude-time converter lock circuit, to the input of which the pulse generator and amplifier outputs are connected, and the OR circuit output is connected to one of the the trigger inputs, another input of which is connected to the output of the control unit, the output of the input device connected to another input of the amplitude-time converter blocking circuit, and the output time-amplitude terminal eobrazovatel connected to the reading device. The drawing shows a block diagram of the proposed pulse voltmeter. The voltmeter contains an input device /, an amplitude-time converter (WUA) 2, a reading device 3, a blocking circuit 4, an amplitude-time converter, a key 5, a trigger 6, a pulse shaper 7, a circuit. "OR 8, an amplifier 9, a control unit 10, The switch 11 of the switching mode (shown in the iienrepry measurements position). The voltmeter works in the following, im. Way. In the initial state, using the control unit 10 and the trigger 6, the potential is applied to the input of the key 5, opening it. The measured pulse passes through the input device /, key 5 and in WUA 2 is converted into

duration proportional to the amplitude of the pulse. The reading device 5 produces a pulse amplitude reading. Through amplifier 9 and the OR 8 circuit, trip 6 is tilted over the rising edge of the measured pulse and closes key 5. This prevents further passage of impulses to the input of WUA 2. Simultaneously, trigger 6 starts the delay pulse shaper 7, the output of which is a signal , acting on the input of the circuit "OR 8 for the time required to convert and read the maximum amplitude of the measured pulse in the WUA and the readout device. The trigger 6 is restored to the initial state by the falling edge of the signal from the output of the OR8 circuit. If by the time the signal ends from the driver 7, a pulse arrives at the input of the voltmeter, then through the amplifier 9 it enters the second input of the OR circuit. the output of the OR circuit is extended by a time equal to the duration of the input pulse and, thus, the circuit. will provide the opening of the key 5 at the times when there are no pulses at the input of the voltmeter. When the switch 11 is switched to single measurement mode, the key 5 closes after the first measured pulse. The key is reset to its initial state using the control unit 10.

Subject invention

A pulse voltmeter containing an input device, the output of which is connected to one of the inputs of an amplitude-time converter blocking circuit made of a trigger, the outputs of which are connected to the key and pulse generator inputs, and the outputs of an amplitude-time converter blocking circuit are connected to the input of an amplitude-time converter and a reading device, characterized in that,

in order to reduce the measurement error, an amplifier, a measurement mode switch, a control unit and a ".OR circuit, to the input of which are connected, are inserted into the amplitude-time converter blocking circuit.

the pulse driver and amplifier outputs, and the output of the OR circuit is connected through a switch of measurement modes to one of the trigger inputs, the other input of which is connected: To the output of the control unit, and

the output of the input device is connected to another input of the amplitude-time converter blocking circuit, and the output of the amplitude-time converter is connected to the reading device.