SU1308904A1 - Cathode-ray oscillograph - Google Patents

Abstract

This invention relates to the field of electronics. The goal is to increase the measurement accuracy and eliminate the distortion of the image of the signal on an electron beam oscilloscope (EVD) by reducing the thickness of the light of the trace of the beam. It is achieved by introducing a phase shifter 6, a voltage divider 5 and coils 7, 8 into the EVL. Coils 7, 8 are placed on the flask of an electron-beam tube (SLT) 3 in such a way that their magnetic axis lies in the horizontal plane of symmetry of the CLT and is parallel the magnetic axis of the One-0 power transformer (ST) 4, and the plane of symmetry of the ST 4 coincides with the vertical diametral plane Oj-Oj ZLT 3. 1 sludge. 0z (L oo O 00 co

Description

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This invention relates to electrical measuring technology and can be used in oscillographic devices.

The aim of the invention is to improve the measurement accuracy and eliminate image distortion of the signal by reducing the thickness of the light of the trace beam.

The drawing shows a structural electrical circuit of the device.

The device consists of a vertical deflection amplifier 1, a horizontal sweep generator 2, a cathode ray tube 3, a power supply transformer 4, a voltage divider 5, a phase shifter 6, coils 7 and 8. Coils 7 and 8 are placed on the flask of the cathode ray tube that their magnetic axis lies in the horizontal plane of symmetry of the tube and is parallel to the magnetic axis of the power transformer Og-Oj. Transformer 4 is located near the cathode ray tube 3.

The plane of symmetry of the transformer 4 coincides with the vertical diametral plane 02 of the cathode-ray tube 3 ..

The device works as follows.

Investigated electronic signal Y is amplified by amplifier 1 and fed to a vertically deflected beam (not shown) of cathode ray tube 3.

A horizontal sweep generator 2 produces a sawtooth voltage that is applied to horizontal deflection plates (not shown) of tube 3. In this case, the horizontal deflection (sweep) of the beam is performed.

The variable magnetic flux field of the scattering of the power transformer 4, penetrating into the zone of the electron beam of the tube 3, tends to act directly on the beam and cause its additional periodic deviation in the vertical plane with the frequency of the supply network.

The voltage from the secondary winding of the supply transformer 4 through the voltage divider 5 and the phase shifter 6 enters the coils 7 and 8, causing an alternating current in them. The latter excites in the space between the coils the alternating magnetic flux, which

This also affects the beam of tube 3, which tends to deflect it in a vertical plane.

With a certain phasing of the ends of the coils 7 and 8 connected to the output of the phase shifter 6, and the adjustment of the phase shifter in the absence of a signal y, the magnetic flux induced by the coils 7 and 8 is shifted by 180 e., Degrees, relative to the magnetic flux of the field. . By adjusting the voltage divider 5 at a zero signal V, the amplitudes of the magnetic scattering fluxes and the amplitudes of the coils 7 and 8 are equal.

When the signal V is applied, the beam of the tube 3 is affected by the vertical deflection amplifier 1 and the sweep generator 2, as well as two equal and opposite in the direction of influence from the magnetic flux of the power supply transformer 4 and the magnetic flux of the coils 7 and

8. With regard to the parasitic displacement of the beam in the horizontal direction, when the arrangement of the coils 7 and 8 and the supply transformer 4 relative to the tube 3 is selected, this displacement is absent. .

0

As a result, the disturbing influence of the magnetic field of the scattering of the power transformer 4 on the beam in the ax of the vertical plane is compensated by the field of the coils and the beam of the electron-beam tube 3 describes on the screen an image corresponding to the shape of the V signal only.

Claims (1)

Invention Formula A cathode ray oscilloscope containing a power supply transformer and a cathode ray tube connected to a vertical deflection amplifier and a horizontal sweep generator, characterized in that, in order to improve measurement accuracy and eliminate image distortion of the signal by reducing the thickness of the light of the beam trace. The oscilloscope is equipped with a phase rotator, a voltage divider and two identical coils located on the flask of the cathode-ray tube so that their common magnetic axis lies in the diametral plane of the tpy6-ki and feeds parallel to the magnetic axis 3I 0890A 4 power transformer, and the plane-between themselves sequentially and the symmetry of the symmetry of the power transformer, and other conclusions are connected to the torus, orthogonal to its magnetic output of the phase shifter, while the axis input coincides with the plane of the symmett-phase shifter connected to the output of the electron -orto-voltage voltage tube, the input of which is the coaxial magnetic axis of the coils, and one with the terminals supplying the power transformer-coil alone, connected by a torch.