SU374723A1 - CONVERTER OF TEMPORARY INTERVALS - Google Patents

Description

one

The invention relates to radio engineering and can be used in measurement technology for measuring time intervals, as well as in radar when converting data into digital form.

The known time interval allocator, containing the sources of the request and response pulses, a condeisator connected to the zero-organ input, a level recovery circuit diode and two charge circuit resistors to which two release devices and ground resistors through dividing diodes and switching resistors , has low conversion linearity.

The aim of the invention is to increase the linearity of the time converter conversion. For this, the second inputs of the trigger devices are connected to the opposite poles of the power supply source, and the control input of the first trigger device is connected to the source of response pulses, the control input of the second slider is connected to the source of the pulses of the request.

The drawing shows the scheme of the proposed Converter time intervals.

Resistors / and 2 are used to charge capacitor 3. Trigger device 4 together

with a resistor 5 and diodes 6 and 7 disconnects the resistor / from capacitor 3. The trigger device 8 together with diodes 9 and 10 turns on the charging circuit of capacitor 3. Diode 10 restores the initial voltage on the capacitor 3. Zero-organ // is a level indicator voltage and gives the signal s the moment when the capacitor 5 is charged to a certain level.

In the initial state, the trigger devices 4 - 8 are turned off. The diode 6 is closed by the voltage across the resistor 5. The magnitude of the voltage drop across the capacitor 3 is equal to the voltage drop on the open diode 10.

The request pulse arriving at the terminal 12, and corresponding to the beginning of the time interval, turns on the descender 5 For a time longer than the entire pre-biling process, after which it returns to the initial state. Diodes 9 and 10 are closed. Capacitor 5 starts charging. The constant charge time is determined by the magnitude of the resistors / and 2, as well as the resistance of the open diode 7.

The response impulse to terminal 13 turns on the trigger 4 and remains on until the end of the conversion. Diode 6 opens and dyad 7 closes. The capacitor 5 continues to charge with a CONSTANT time and only detected by the resistance of the resistor 2.

When the voltage on the capacitor 3 reaches a certain level, the null-org triggers and sends a pulse to the output terminal 14 corresponding to the end of the transformed interval. After the conversion is completed, the capacitor 5 is discharged to the null-organ through diode 9 and resistor / 5.

Subject and s-i6 rete n and

A time converter that contains the sources of the request and response pulses, a capacitor connected to the zero-organ input, a level recovery diode, and two charging circuit resistors, to which two output devices and bias resistors are connected via dividing diodes that, in order to increase the linearity of the conversion, the second outputs of the release devices are connected to the opposite poles of the power supply source, and the weighting input of the first release device is Connected to the source of response pulses, the control input of the second trigger device is connected to the trigger impulse source.