SU1636999A2 - Sawtooth voltage generator - Google Patents

Abstract

The invention relates to a pulse technique and can be used in the construction of sweepers. The purpose of the invention is to ensure the correction of the exponential nonlinearity of the current generated and the preservation of linearity while adjusting its scope. The device contains a key driver 15 of the saw-tooth current, which includes an amplifier of voltage pulses I and an integrator 8, built on an amplifier 16. 2 Il.

Description

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The invention relates to a pulse technique, which can be used to build a sweep device. The invention is an improvement of the invention according to aut. st. 1001450.

The purpose of the invention is to provide for the correction of the exponential nonlinearity of the current generated and to maintain linearity while adjusting its span.

Figure 1 shows the structural electrical circuit of the generator; on - epures, referring to his work

The generator contains an input amplifier 1 of voltage pulses, the input of which is connected to the bus 2 of the clock source, and the output - to the control input of the switch 3 of double-sided conduction, the output of which is connected through separation capacitor 4 with an inductive load 5, key 6 of bilateral conduction, the control input of which is connected to the bus 2 of the clock source, its output is connected to the output of the double conduction key 3, and the input is connected to the bus 7 of the power supply, integrator 8, the potential input bus of which It is connected to the junction of the coupling capacitor 4 with inductive load 5, and the output is connected between the common bus and the second output of the inductive load 5. Key element 6 (transistors 9 and 10, diode 11, resistor 12) and amplifier 1 of voltage pulses with a switch 3 ( transistor 13, diode 14) of two-sided conductivity form a key driver 15 sawtooth current. The integrator 8 is built on an amplifier 16, a resistor 17 and a capacitor 18.

The generator works as follows.

The synchronizing pulses Iv received at the input of the amplifier 1 (FIG. 2a are amplified by it to the power level at which the transistor 13 is reliably saturated during the forward sweep stroke, when the key element 6 is locked, and the locking of the transistor 13 during the reverse sweep sweep, the key element 6 is unlocked. As a result, on the left (according to the scheme of FIG. 1) output of the separation-capacitor 4. a pulse voltage is formed

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(fig. 26), which through a capacitor eliminating the constant

the component arrives at the first output of the inductive load 5 (Fig. 2b). At the same time, the pulse voltage Ic (Fig. 2c) is fed to the input of the integrator 8, which forms the sawtooth voltage of the nonlinearity correction UKOpp (Fig. 2d). From the output of the integrator, this voltage is applied to the second output of the inductive load, and the difference voltage U is applied to the latter.

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 UKOPD view of which is shown in fig.2d. Under the action of this voltage, inductive current 1OTC is formed in an inductive load (1 (Fig. 2e). However, unlike the known generator, this current varies not linearly, but linearly, 1

The magnitude of the nonlinearity correction voltage is chosen so as to compensate for the voltage drop across the active component resistances.

in the load circuit: U

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hotk: l kgde range of the sawtooth current in the load, Kf is the total value of the active resistance components in the load circuit. Under this condition, linearity of the sawtooth current is maintained, which is maintained when adjusting its range by varying the voltage of the power supply E.

Due to the use of a sawtooth current in the keyformer, the linearity of the sawtooth current is ensured both on the forward and backward sweep.

On the basis of the invention, it is possible to construct sawtooth current generators with a positive effect of current linearization only on the forward sweep path when using other key sawtooth current formers, for example, based on the use of resonance effects when generating the reverse sweep path.

Claims (1)

Invention Formula Sawtooth generator auth.St. No. 1001450, characterized in that, in order to ensure the correction of the exponential nonlinearity of the generated current and maintain linearity while adjusting its scope, an integrator is entered into it, the potential input bus of which is connected to the junction point 516369996 coupling capacitor c is injected between the common bus and the second output load, and the output is an inductive load switch. chen between shared bus and sec water inductive load. t t