SU1095369A1 - Sawtooth-parabolic signal former - Google Patents

Abstract

A FORMER OF PILOOTH-PROCESSING SIGNALS containing the first operational amplifier, the output of which is connected to its inverting input through a parallel connected first capacitor and the first key, the control input of which is connected to the output of the source of control pulses, the second operational amplifier, the output of which is connected to its inverting input switched on the second capacitor and the second switch, the control input of which is connected to the output of the source of control pulses, the first and second re sources, the first terminals of which are connected respectively to the inverting inputs of the first and second operational amplifiers, the third operational amplifier, the inverting input of which through the third resistor is connected to the output of the second, T. 13 3 operational amplifier and through the fourth resistor to its own output, fifth sixth, seventh, eighth, ninth, tenth resistors, first, second, third input buses, characterized in that, in order to extend the functionality by ensuring the independence of the average value and the generated signal in each of the three portions of the formation intervals from the control potentials, refer to the other portions, the second terminal of the first resistor is connected to the second input pin, the second terminal of the second i resistor is connected to the output of the first operational amplifier, the non-inverted inputs of the first, second and The third operational amplifiers are combined and connected through the fifth resistor to the first input bus, and through the sixth resistor to the third input bus, and inverting about the input of the second operational terminal The silicon coil is connected via the seventh resistor to the second input bus and via the eighth resistor to the third input bus, 00 and the inverting input of the third optoamplifier through the ninth to the resistor is connected to the second busbar and to the third input bus.

Description

The invention relates to a pulse technique and can be used, for example, as part of automatic television image correctors.

. Known driver sawtooth-parabolic signals containing the first, second and third operational amplifiers, the first and second electronic switches connected between the output and the inverting input of the first and second operational amplifiers, respectively, the first and second capacitors connected in parallel to the first and second electronic keys, respectively, and also the first, second, third, fourth, pty and sixth resistors C13.

The disadvantage of this former is limited functionality.

The closest technical solution to the proposed is a driver of sawtooth-parabolic signals containing the first operational amplifier, the output connected to the inverting input through a parallel-connected first capacitor and the first switch, the control input of which is connected to the output of the source of control pulses, the second operational amplifier, output connected to the inverting input through a parallel connected second capacitor and a second switch, the control input of which is connected to the output of the source as the control pulses, the first and second resistors connected to the inverting inputs of the first and second operational amplifiers, a third operational amplifier, an inverting input connected through the third resistor to the output of the second operational amplifier and through a quarter resistor to its own output, the fifth, sixth and seventh, The eighth, ninth, and tenth resistors, the first, second, and third input buses C 2.

The drawback of the device is the limited functionality due to the dependence of the average value of the generated signal in each of the three portions of the formation intervals on the control potentials relating to the other portions.

The purpose of the invention is to expand the functionality of the device by ensuring the independence of the average value of the generated signal in each of the three portions of the formation intervals from the control potentials belonging to other portions.

The goal is achieved in that in the driver of sawtooth-parabolic signals containing the first operational amplifier, the output of which is connected to its inverting input through a parallel-connected first capacitor and the first key, the control input of which is connected to the output of the source of control pulses, the second operational amplifier, the output of which is connected to its inverting input through a parallel-connected second capacitor and a second switch, the control input of which is connected to the output of the control source pulses of pulses, the first and second resistors, the first terminals of which are connected respectively to the inverting inputs of the first and second operational amplifiers, the third operational amplifier, the inverting input of which through the third resistor is connected to the output of the second operational amplifier and through the fourth resistor to its own, output, p fifth, sixth, seventh, eighth, ninth, tenth resistors, first, second, third input buses, the second output of the first resistor is connected to the second input bus, the second output of the second resistor is connected to the output of the first operational amplifier, the non-inverting inputs of the first, second and third operational amplifiers are combined and connected via the fifth resistor to the first input bus, and through the sixth resistor to the third input bus, and the inverting input of the second operational amplifier is connected via the seventh resistor the second input width and, through the eighth resistor, with the third input width, and the inverting inputs, the input of the third operational amplifier, through the ninth resistor, is connected to the second input bus and through the tenth resistor - with a third input bus. FIG. 1 shows a structural electrical circuit of the device; FIG. 2 (a, b), 3 (a, b, c) are diagrams explaining the operation of the device.

The device contains the first operational amplifier 1, the output of which is connected to the inverting input through a parallel-connected first capacitor 2 and the first switch 3, the control input of which is connected to the output of the source 4 of control pulses, the second operational amplifier 5, the output connected to the inverting input through parallel the connected second capacitor 6 and the second switch 7 whose control input is connected to the output of the source 4 of control pulses, the first and second resistors 8, 9, respectively connected to the inverter These are the inputs of the first and second operational amplifiers, the third operational amplifier 10, an inverting input connected through the third resistor 11 to the output of the second operational amplifier and through the fourth resistor 12 to its own output, fifth, sixth, seventh, eighth, ninth, tenth resistors 13–18, first, second, third input buses 19, 20, and 21; another terminal of the first resistor is connected to the second input bus; another terminal of the second resistor is connected to the output of the first operational amplifiers; non-inverting inputs of operating forces The telephones are connected and connected via the fifth resistor 13 and to the first input bus 19 and through the sixth resistor 14 to the third input bus, the inverting input of the second operational amplifier is connected via the seventh resistor 15 to the second input bus and through the eighth resistor 16 to the third input bus, the inverting input of the third operational amplifier is connected via the ninth resistor 17 to the second input bus and through the tenth resistor 18 to the third input bus 21. The device works as follows. The formation cycle starts from the moment of time t (Fig. 2, 3) by opening the keys 3 and 7 (Fig. 1) under the action of the control pulses generated by the source 4. With this

control potentials U, and, -, are fed to the input buses 19, 20, and 21.

reflecting the average value of the corrected television signal, respectively, in the intervals t2-ta, tj-t. and (Fig.2, 3). The ratio of control potentials determines the shape of the synthesized signal. The equalization between the averages over the sections and the corresponding control potentials is not necessary. When the zonal measuring units generating the control potentials have a different transmission coefficient, a different ratio should be chosen between the resistive first of sawtooth signal synthesis (Fig. 26), which has average values in the said intervals and the corresponding control potentials correspond to the ratio Ui + of Suppose for definiteness that 1 V, U2 2 V, Uj 3 V and that the resistances of the resistors 13, 14, (FIG. 1) are equal. Then a potential equal to U- is established at the connected non-inverted inputs of the operational amplifiers, and the potential difference applied to the resistor 8 will be zero. By virtue of this, after unlocking the key 3 at the output of the operational amplifier 1, the potential change rate will be zero, i.e. its original value is maintained. And the initial value was determined in the closed state of the key 3 by the potential at the non-inverting input, i.e. U. Therefore, a zero potential difference will be applied to resistor 9, as well as to resistor 15, and both of them, therefore, will not affect the signal generated by operational amplifier 5. Only resistor 16 will determine the waveform, to which voltage (Uj-U), and therefore the potential at the output of the operational amplifier 5 will fall linearly (Fig. 2a). The operational amplifier 10 inverts this signal relative to the potential 1) 2 2 V at the non-inverting input and at the same time amplifies the signal (FIG. 26, dashed lines). But at the same time the potential difference (U 2) is applied to the resistor 1o, and its current, flowing through the resistor 12, shifts the formed signal downward (Fig. 26, a solid line). This ensures the formation of a sawtooth signal, in which the average value in the t2-C segment is U (1 B), the average value in the t-t segment is equal to U (2B), the average value in (3 V), the Building site t-t is equal to U ; 5 by frames 13, 14 so as to ensure the correspondence between the average values by sections and the levels of the corrected video signal in the same areas. Let us now consider the formation of a parabolic signal, in which the average values in peripheral intervals are equal. Let us assume, for definiteness, that the control voltages satisfy the same condition, in particular, and 1 V and and. 2B, in and out, the potential at the non-inverting inputs of the operational amplifiers is set to U -, (%) and to resis. Torus 8 will be attached to the difference poi. Therefore, operational power amplifier 1, after the key 3 is opened, at the time t begins to form a linearly falling voltage (Fig. 3a). To the inverting input of the operational amplifier 5 through the resistor 16, the current flows, since a zero potential difference is applied to it, but a saw-tooth flows then. through resistor 9 and direct current through resistor 15. Operational amplifier 5 gives an increasing parabolic response (Fig. 36, dashed parabolic line) to a linearly decreasing effect and linearly decreasing reaction (Fig. 3, dashed lines) to a constant effect current. The integration operation is linear, to the extent that the output of the operational amplifier 5 forms the sum of these reactions, shown by 9 in FIG. 36 by a solid line. An appropriately shaped current flows through the resistor 17, is inverted and amplified by the operational amplifier 10 (Fig. 36, a dashed parabolic line). Through the resistor 18 connected to the inverting input of the operational amplifier 10, the current does not flow, since a zero potential difference is applied to it. But a direct current flows through the resistor 17, causing the parabolic signal to be shifted downwards (Fig. 8, solid line). In it, the average value in the interval t - t is equal to and (1 V), the average value in the interval t - t is equal to Uj (2 V), the average value in the interval t. - t ,. equal from (1 V). Thus, the introduction of schematic links provides the dependence of the average value in each segment only on the corresponding control potential. But if the average value of any generated signal in this area depends only on the corresponding control potential, then its dependence on other control potentials corresponding to adjacent areas is absent. The suppression of the influence of each of the control potentials on the average value of the generated signal in those areas in which the lower value should depend on other control potentials allows the functional capabilities of the device to be expanded.

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Claims (1)

A DRIVER SIGNALS FORMER, comprising a first operational amplifier, the output of which is connected to its inverting input through a parallel connected first capacitor and a first switch, the control input of which is connected to the output of the control pulse source, a second operational amplifier, the output of which is connected to its inverting input through a second connected in parallel a capacitor and a second switch, the control input of which is connected to the output of the source of control pulses, the first and second resistors, the first conclusions of which are connected respectively to the inverting inputs of the first and second operational amplifiers, the third operational amplifier, the inverting input of which is connected through the third resistor to the output of the second operational amplifier and through the fourth resistor to its own output, fifth, sixth, seventh, eighth, ninth, tenth resistors, first, second, third input buses, characterized in that, in order to expand functionality by ensuring independence of the average value of the generated signal each of the three sections of the formation intervals from control potentials related to other sections, the second output of the first resistor is connected to the second input BUS, the second OUTPUT of the second p resistor is connected to the output of the first 16 operational amplifier, non-inverting inputs of the first, second and third operational amplifiers combined and through the fifth resistor connected to the first input bus, and through the sixth resistor to the third input bus, and the inverting input of the second operational amplifier is connected through the seventh rubber the side with the second input bus and through the eighth resistor with the third input bus, and the inverting input of the third operational amplifier through the ninth resistor is connected to the second input bus and through the tenth resistor to the third input bus. eleven