SU1706019A1 - Generator of stepped saw-tooth voltage - Google Patents

Abstract

The invention relates to a pulse technique and can be used in radio engineering, automation and measurement technology. The purpose of the invention is to improve the accuracy of the sweep time. The device contains a generator 1 clock pulse. element 2, frequency divider 3, pulse counter 4, digital-to-analog converter 5, output 6 of the signal for the end of the forward sweep stroke, the resolution resolution bus 7-10, the division factor, the initial sweep voltage, the reference voltage, and the output bus 11. 1 il.

Description

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The invention relates to a pulse technique and can be used in radio engineering, automation and measurement technology.

The purpose of the invention is to improve the accuracy of the sweep time.

The drawing shows an electrical block diagram of the proposed generator.

The generator contains a generator of 1 clock pulses, element I 2, a divider of 3 frequencies, a counter of 4 pulses, a digital-analog converter 5.

The first input of the AND 2 element is connected to the output of the 1 clock pulse generator, its second input is connected to the counting resolution bus b, the third to the output of direct transfer of the counter of 4 pulses and the output 7 of the signal of the end of the sweep stroke, and the output to the divider 3 input frequency, the output of which is connected to the input of the counter of 4 pulses, and the information inputs to the bus 8 of the division factor.

The information inputs of the counter 4 pulses are connected to the bus 9 of the initial sweep voltage, and the outputs to the information inputs of the digital-to-analog converter 5, the input voltage of which is connected to the bus 10 of the reference voltage, and the output to the output bus

11The device operates as follows.

The pulses from the generator 1 clock pulses through the element And 2 arrive at the divider 3 frequency with a variable division factor Ki and then on the counter 4 with the counting factor K2. In a digital-to-analog converter (DAC) 5, the counter code 4 is converted into a stepwise sawtooth voltage, the amplitude of which can be changed by changing the reference voltage.

In the initial state on the bus 9 resolution resolution is the signal O, prohibiting the passage of pulses from the generator 1 clock pulses to the divider 3 frequency. Divider 3 and counter 4 are reset to zero, the values of KI and K2 are set. The start of the GSPP sweep is performed by applying the counting signal via the bus 9. During the forward stroke of the sweep, at any of its stages, a stepped sawtooth signal can be stopped for an arbitrary time, and then the sweep can be continued by generating the corresponding signal in width 9.

When overflow, counter 4 generates a corresponding signal arriving at the AND 2 element and stopping the scan.

Claims (1)

Invention Formula A step-sawtooth voltage generator containing a clock pulse generator, an AND element, a frequency divider, a pulse counter, a digital-to-analog converter, whose information inputs are connected to the counter outputs, an output with an output bus, and a reference voltage input with the information inputs of the frequency divider are connected to the dividing ratio bus, characterized in that, in order to improve the accuracy of the sweep time, the first input of the AND element is connected to the output of the clock generator, the second The input is connected to the counting resolution bus, the third one - to the direct transfer output of the pulse counter and the output signal of the end of the forward sweep stroke, and the output to the input of a frequency divider, the output of which is connected to the input of the pulse counter, whose information inputs are groom sweep,