DE2402042C3 - Electron beam deflection circuit for television receivers - Google Patents

Description

Siigivahnlomi. d; is ss in limn mi! , lei VVi uk.ilperiodi- isl, becomes L'iiH-ni AUS) -Mh) JS ₁ InMIiIiIl! 2 / H) Ji-IuIiIi, which resounds at ili-n IJiIM ¹ Ii di-r I rair.isloicn (J ₁ and (,) ■ unseen, inn!) I: iili- I ranskiorcn / 11. Siniiii wml, n known way iiluT I'm Ahk-iik μIi h /.,., Which closer to a K.oikIuis.nor ('. .111 emeu Voihiiulini _t > sj-.tidkt I, / wist lu.-ii ilii Linillcr dor I r.insisloriMi (J; uiul (J, attached isl, a SH) JiY.ihnlonnijL'iT Siroin produces.

If such hot i-Ineni hekaiiiiieii V. rlikalahlenkkreis the l.uiillcrspan: mng to the Verbiiulimgspuukl Ii is beirachicl, it isl during the Kiicklaiilpenodc Ir a pulse but a h.it Verlaiii, which decreases during an I linlauipei iode / s linear , as by S. in I "ig. 2Λ ge / eigi isl; this voltage curve is obtained with every i lalbbikliiilerv.ill. is echoed, due to the circuit construction ¹ .. the Saiiigungs voltage of the transistor (J \ etc. el which is lower than the Energiequcllcnspannung In isl, which is given to a terminal 5, which is connected to the collector of the transistor Q ₁ The sagittal I friction signal S'i, shown in Fig. 2C , is applied to the base of the transistor Q ₁ , the transistor (J) is opened during the όν \ line period / between the times / 1 and / 1 in the transistor (J ₁ consumed electr If the power is disregarded, its voltage component is tier in T 'i g. 2Λ hatched irape / shaped area.

The current flowing through the transistor (J ₁ at this time is the / i-part of the drive signal .S'i, where / i is the current amplification factor of the transistor Q ₁ , so that the current component of the power consumed in the transistor (J \ Current .Vj, which is close to the drive signal S \ in the course / u, as shown hatched in Cig. 213. Therefore, the power consumption / - "in transistor Qi is the product of the voltage coefficient. Hatched in F-'i g 2A, and the current component shown hatched in Cig.

From the company stand The transistor Q] now turns off between the times i | and Z ₁ open, as I- "i g. 2A to 2C" show, but there is a stress component, tier in C i g. 2A is surrounded by a dashed line. to the! -! miner of the transistor Qi is not given, but is given to the Hmitier-collector-Slrecke of the transistor Q \ , ti. That is, the above stress fraction is a useless stress. The power consumption due to this useless voltage in the transistor (Ji i ^sl thus a useless power consumption and thus the output efficiency of the known vertical deflection circuit is reduced.

An embodiment is now based on FIG ties vertical deflection circle according to the invention.

In the embodiment of ^F: ig. J consists of a push-pull amplifier with F.intact output, which forms an output stage 31, from two transistors (Jw and Q \>. Since the transistors Qw and C * i- 'are complementary in this embodiment, a common input terminal 32 is at the bases of the Transistors Cn and Q \ 2 are provided. A sawtooth-shaped drive signal .S'i is applied to the input terminal 32 in order to alternately open and block the transistors Qi 1 and Qu . At a connection point In between the emitters of the two transistors Qw and Q \ : A series circuit of a deflection yoke L and a capacitor C is connected

Sägc / ahiilorniiger Ableiiksli oin dureil the deflection yoke /., which is essentially the same as in the Sland der Lechnik. A switching device II such as a transistor is connected to a voltage source connection 33 via a strike m. hyristor, a multi-layer diode or the like connected in series to the output sliile 3! Inlernuilierend emc voltage l'u dv \ ' voltage source. The sleuerelecti'ode tier switching device II is connected to the connection point If necessary via a dilferencing circuit 12 in order to provide only a voltage pulse that is generated at the deflection yoke / and thus to be controlled from animal impulse spanning into the conductive wedge region. In the embodiment shown, a four-layer triode is used as the sound device 11.

Between the four-layer number II and the collector of the transistor Q _n isl a storage device 13 geschähet in order to determine the operating voltage for the output stage 31 of the (iegeniakiversiärkers with input output rummaging tier I linlaul period I's . The storage device 13 is used to determine a voltage

(where /; a positive integer isl) from the voltage l'u of the clamping element source. For this purpose, the storage device 13 has several capacitors 14.7.

146 which are sounded in series or parallel to each other

will. In the embodiment shown, the operating voltage is too

U,

chosen so that only two capacitors 14.7 and 146 are used. In the device 13 diodes 15.7 and 156 are used to block the reverse current and a diode 15c, which is connected to one end of the capacitor 14.7, and a line L \. which is connected in parallel to the series circuit of the capacitor 14.7 and the diodes 15.7 and 156, form an Eniladcweg for the capacitor 14.7.

A drive voltage & is fed to a terminal 17, which is led out from the cathode of the diode 156 via a diode 16. The drive voltage Fs is selected to be lower than the voltage En in order to block the diotle 16 during the operation of the vertical deflection circuit, so that the connection 17 is separated from the output stage 31 and the device 13 has no influence on the deflection process. A coil 18 which is connected to the anode of the four-layer triode 11. is used to make the charging time constant of the capacitors 14, 7 and 146 during the open state of the four layer triode 11 long. In Fig. 3 designate 20,7 and 206 connections of the circuit 1.3.

F! S is now based on the F-i g. 4A to 4F die Operation of the circuit shown in Fig. 3 is described.

When a drive signal Si shown in FIG. 4A is applied to the terminal 32, the transistor Cn is opened during the positive interval of the drive signal Si and the transistor Q \ ₂ is opened during the negative interval of the drive signal S \ . In the control state of the deflection circle, the four-layer triode 11 is blocked. When / .. B. the control voltage Evan is applied to the terminal 17 at the time / _n , since the transistor Qw is open, a current S _{1 flows} in accordance with the drive signal Si as shown in FIG. 4B shows by

the circuit made up of the transistor Cn. the deflection yoke /. and the capacitor ("and the capacitor Γ is discharged by this current. If the drive signal .Si becomes negative at the time ίο, the transistor Qw is blocked, but the transistor Qn is opened. Therefore, the charge stored in the capacitor C is via the circuit of the Transistor Q \> discharges and thus a current S. \, as shown in Fig. 4C, flows through the transistor Ci? And a current which is opposite in polarity to that which flows when the transistor Q]] is open ( with reference to arrow b in Fig. 3) flows through deflection yoke L. This current increases with time.

At the time / ι the transistor Q] 2 is blocked by the driver signal .S'i, the transistor Q] \ wild, however, is again opened by the Trcibcrsignal S] and the transmitter current flows through this transistor / ti. At this point in time, however, the reverse current flows (.l through the deflection yoke / .. so that the transistor Cn is blocked. The current flowing through the deflection yoke /. Therefore charges a leakage capacitor f "'which is present in parallel with the deflection yoke / 3, and also flows in the reverse direction through the transistor Q] 1. As a result, the transmitter voltage of the transistor Qw increases abruptly and generates a voltage pulse which is a flyback pulse is determined by a resonance circuit, which is formed from the deflection yoke /. and the capacitor, which is sounded parallel to it and comprises the scattering generator (". This determines the return penode 7 / between the times / 1 and h . Since the pulse voltage is higher When the collector voltage of the transistor Qw is, the pulse voltage is applied via the DilTeren / ierkeis 12 to the control electrode of the four-layer triode II in order to open it it the voltage l. \, the voltage source m is applied to the collector of the transistor Cn to make its collector voltage / 11 Hn , as indicated by .Si, in I i g. 4L is shown. and the capacitors I4w and 14 / 'are connected in series via the four-layer triode II to the terminal 5 5 and therefore each of the capacitors 14, 7 and 14 /' will be charged with a voltage which has the polarity shown in FIG . The backlash pulse spaiuuing increases as the tension /: ii au. il. H. the voltage at the Vcibin duiigspiinkt In becomes /: ii, as indicated by .S '/ in I i g. 41 'is shown. After the capacitors 14./ and 14 / 'are charged, as mentioned above, the Sieuerspaiinuiig /' s is disconnected from the circuit as a result of the operation of the diode 1h.

The time interval during which the Vierschichttriode is ollen 11, occurs between ilen times / 1 and i *, while the Rüeklauliiiipulsspaiinuii). Is produced, after time /> to the !! center voltage of the I ransisiors Qw is reduced. The Liiiillerspaii niing des I ransisiors Qw is lower than its collector voltage and the Steiiei clcktrodcnspaniuiug the four-layer triode II is lower than its cathode voltage, so that the four-layer triode is blocked and the supply of the voltage /: »is interrupted, the signal S, in i ig.4D shows the current that flows through the four-layer triode II. Since the transistor Qw was left in time between the Zeilpiiiik

th I. · and l \ open, you will voltages Ik in

the capacitors 14./IvW. Ι4 /> are stored via the circuit and the condensate or 14.7, the Ί ransisloi Qw, the deflection yoke / .. the capacitor (', the diode IV and a capacitor 14.7 or the circuit from the capacitor 14 / ). the diode 15b. the transistor Cn eiern deflection yoke / .. the capacitor C and the capacitor 14 /) discharged. Here, the discharges of the capacitors 14, 7 and 14b are parallel discharges, so that before the collector of the transistor! Cn supplied voltage is not the voltage ft but the thread tension of the capacitors 14.7 line

_{| o} 14b. namely -, / _; ;, is. Thus, the collector voltage of the transistor Cn elen in Fig. 41 ·! During the time interval from the time i to zi the time i. "at which the transistor Cn is opened again, the transistor Q _{1 is} open and the above-mentioned discharge crises are not formed, so that the collector voltage of the transistor Cn a nearly constant value that is slightly lower than \ /: ".

2 (. < Even if the four-layer triode II is blocked and before the supply of the voltage /: '"the Spanmmgsquellc is interrupted, as described above, the push-pull amplifier with a finiact output eier output stage H receives the operating voltage signal from

almost, / ■ ',, unel damil takes the tension .S', - on the

!! miller des I ransisiors Cn. el. h. at the connection * point I _n . like fig. 41 "show), gradually decreases as a result of the voltage drop which is caused by the current flow through the contradiction component of the deflection yoke /.

If the l.eisiungsv erbiaiich / 'in eiern

Iransisior Cn is taken into account, isi its voltage

component essentially that in I i l ·. 41 · "hatched

is shown triangular "I part. This" stress component corresponds to the triangular part of the hatched voltage component of FIG. 2A.elie of the signal

\ · Unel the tension / ·, / between the Zeilpunkien />

and ί, is surrounded. those at the _m F ι ». I shown

.! (. State of the leehnik aiilireien. It's easy understandable. that the I .eistiingsverbraiich / 'in the I i-ansisioi Cn both fri inelation. eggs than the product eggs Above you can see the stress components used

and dv \ - consumed Siromkonipoiienie in I 'ig. 41!

■ is schrallieri shown isi (corresponding to the schrallierlen I eil der I ι j ·. 21!) Compared to the Staiul dci technique sunk is to minify. This means that through the Fi'linelung the useless tension component. elie

is shown by the dashed Schiaffm in Fig..Il.

so before the useless Spannuiigskoniponenlc cnispnVhl, elie

by the dashed Uloek in I ijv.'A des Slaneles

(he I echnik is shown . is eliminated. Dahei canu improved by before film, lung the (icsauiileisiungsv crbi also ν cn iugcri unel «.liitiiii eier Aiisgaiigsvv irkungsgrael

ss vv ground.

In the case of the in FIG. J shown Ausliilii uiigslonn lsi elie Belnebsspaiiniiiig liir the (icgcniakiv ei siäikcr SI mil l-iMlaklausgani.! By the use of the two condensers 14.7 and 14b in the helriebsspaiiuiings generating circuit Π during the return period '/

The birth, however, is not too early the I ι, ·, i beschiänki. but it can e.g. /) Konelensalorcii veiweiidei vvcielcn, to a Bclriebs

above-mentioned way

produce. It is advisable to use outer elements to reduce the the return node '/'; ■ without Vnnm.ei iiiu- des

voltage from _(i / "m

Output efficiency, the operating voltage is small compared to the voltage Eo of the voltage source do.

5 shows a circuit diagram of a further embodiment the storage device 13 with three capacitors 14a, 146 and 14c.

In the embodiment of FIG. 5, diodes 156, 15c, 15e and 15 / serve to reduce the discharge path for the To form capacitors and diodes 15a and 15d are used to block the reverse current. Here is

the voltage y E _{0 is} stored in each capacitor 14a to 14c. A detailed description of the structure and the mode of operation of this embodiment is omitted since it is obvious to a person skilled in the art.

6 shows a circuit diagram of a further embodiment of the vertical deflection circle according to the invention, in which the same reference numerals and symbols as in Fig. 3 denote the same elements.

In the embodiment of FIG. 6, the storage device 13, the output stage 31 forming push-pull amplifier feeds the single ended the operating voltage, constructed in the following manner: a series circuit of a capacitor 21, a diode 22 and a capacitor 21 b is connected in parallel to the transistors Qn and Qn, which form a push-pull amplifier with a single-ended output. A diode 22ύ is connected in parallel to the series circuit of the diode 22a and the capacitor 216, and a diode 22c is connected in parallel to the series circuit of the capacitor 21α and the diode 22a. The above circuits are connected to the four layer triode 11 and the collector of the transistor Qw through terminals 20a and 20b , respectively.

In this embodiment, the diode 22a serves to form the Ladcstreckc for the capacitors 21a and 2ib, while the diodes 22b and 22cdazu serve to form the discharge paths for charges stored in the capacitors 21 b and 21 respectively.

Fs now the operation of the in F i g. 6 described embodiment shown. In this embodiment, a return pulse is generated at connection point 111 and the four-layer triode is opened and blocked in accordance with the return pulse, as in the case of the embodiment in IMg. 3. During the return period Tr or during the / eitinlervalls in which the four-layer triode II is open, the terminal 20 receives ;; the voltage E _{0 of} the voltage source from the terminal 33 and thus the output stage 31 receives the voltage /: i> via the terminal 20 / j and the capacitors 21a and 21 /) are μ with the in Fi. b shown l'olariläl loaded

and their connection spiiumingcii are -, En. During

the I liiilaul'pcriodc 7! s or the / eitinlervalls in which the ss Four-layer triode Il is blocked, the voltage /: 'u the terminal 20a is not supplied, but the

Voltage _Ί /: ii, which is in capacitors 21a iintl 2l />

i'.espeieherl, the output stage .11 /.!! This (n> means you 1.1 the charge that is stored in your capacitor 21a, via the closed path from the capacitor 21a, the transistor Qw, the deflection yoke /., The capacitor C, the diode 22 /) and the capacitor 21a is discharged and stored in the capacitor 216 charge via the closed path from the capacitor 21b, diode 22c, the transistor Qn, the deflection yoke L, capacitor C and the capacitor 216 stored

is used to bring the voltage -y Eo to the collector of the

Supply transistor Qw via terminal 206. It can therefore be easily understood that the embodiment of Fig. 6, like that of Fig. 3, achieves the deflection operation and improves the output efficiency. It is of course possible here for η capacitors to be connected in series in circuit 13

used to set the operating voltage - Eo in the

Generate trace period.

7 shows a circuit diagram of a further embodiment of the invention, which the tension — Eo (at the

embodiment shown yEo) as the operating voltage

is used during the trace period Ts and makes the operating voltage greater than the voltage Eo during the flyback period Tr.

In FIG. 7, 25a and 256 represent further diodes for blocking the reverse current and also 25c represent a diode for blocking the reverse current E ₀ to superimpose the voltage source during the flyback period Tr. this

means that the stresses -γ Eo to which in the

Capacitors 21a and 2li> are charged during the flyback period Tr , through the transistor Qw during the flyback period 7s and also through the series connection of the capacitor 24 and a resistor 23, so that the capacitor 24 is charged to 5 /: 'o. Those in the capacitor 24

stored charge is discharged through the transistor Qu during the flyback period Tr , so that the operating voltage which is supplied to the collector of the transistor Qn during the flyback period Tr , almost the voltage E _{0 of} the voltage qucllc plus the

charged voltage, En in capacitor 24

will. The flow of water at the junction I μ is inclined in I · "i y. 8. The embodiment standard of FIG. 7 can therefore improve the output efficiency.

In addition, in the case of the Aiisfüliruiigsform the Fig. 7 the control electrode oi'f four-layer triode II the control voltage via a transformer 2b; This is a Uiiloi difference between the Ausl'ühruiigsforinen of Fig. b and 7. The transformer 26 has a primary winding 2da and a secondary winding 2b />. The primary winding 26a is parallel to the deflection yoke /. trained !, while the secondary winding 2ft /> is made between the control electrode and the cathode of the four-layer triode Ii.

I lieivii I ISLiII /eichnunj'.en VOU MO / 3011

Claims (6)

02 042 I'akTilanspnichc: I. Elckironeiisi ^r ahlablcnkkrcis for l'ernsehemp fänger and the like, consisting of / white as <iegeniakl amplifier III'ü transistors connected to one output of the amplifier, a deflection coil connected to an output of the amplifier, a light voltage source for the amplifier, a / wipe the secondary voltage source and switching device connected to the amplifier, an I .adiingsspeichereinriehiung / between the switching device and the amplifier, and a control device for generating a control signal which blocks the switching device during the I linlaul period of the electron beam and opens during the flyback period. calibrate, dal! the switching device (II) calls the storage device (15) / ur discharge via the amplifier (.31) during the I line period from the voltage source (I'd) and during the return period through a voltage transfer sirecke, 'Li) to the amplifier ( 31) bridged, and that the storage device (1.3) has capacitors (I4.v, i4b, IAc; 21; / , 21b) , which during the return period by first switches (15./; 15 ;;, 15ft; 22; /) can be connected in series and during the I linlaul period by second switches (Ι5Λ. 15c; 15 / ?. 15c, 15 /; I5c; 22Λ, 22c). 2. deflection circuit according to claim I, characterized in that the switches (! 5; / to 15t ", 22; / to 22c) of the memory device (13) are diodes. J. Deflection circuit according to claim I oiler 2, characterized in that the storage device (13) from the input to the output has a series capacitor (I4./J, a cross diode (\ 5c), a longitudinal diode (I5; / J, a cross capacitor ( 14ÖJ and a longitudinal diode (15OYaLiI), whereby the girders lying in the longitudinal direction are bridged by the voltage transmission path (L \) . 4. deflection circuit according to claim I or 2, characterized in that the Ladungsspeichereinriehliing (Π) between the input and the output a series capacitor (Ht ¹ Jl a QiIeIcIiOiIe (ISt ¹ J, a series diode (15c / J, one with the voltage transmission path (L having \) connected parallel-path diode (I5 / J, a longitudinal capacitor (14 / J, a transverse diode (ISrJ, a I.ängsdiode (15 / J, a cross-capacitor (\ 4b) and a l.ängsdiode (I50J, wherein the Spannungsübertragungsslrecke (l. \) bridged the longitudinal elements. 5. deflection circuit according to claim I or 2, characterized in that the storage device (13) consists of a to the transistors (Qw, Q \>) of the push-pull amplifier (31) connected in parallel series circuit of a capacitor (21; / J, a diode (22, / J and a capacitor (21i> J and a diode (220, 22rJ) parallel to the two first and second elements of the series circuit. 6. deflection circuit according to claim 5, characterized by a transverse resistor (23) and a longitudinal diode (25, / J at the entrance, a long diode (25ÖJ am Output of the storage device (1.3) and a capacitor bridging the longitudinal elements (24). The bell lift eiiu'ii l.leklroiieiislrahlablenk circle for television receivers and the like, besieiu off / white as push-pull amplifier with I iniakiausg, in (. transistors happened, one at the exit of the ' Reinforced connected deflection coil, one llemebs voltage source for the amplifier, cmcr / wischm du. Operating voltage (| iial and the amplifier switched len Schalteinrichliing, a l.aduiigsspeicliereinrich lung / wipe the shuttering equipment and the Versuir ker, and an adjusting device for he / eiigiing a Control signal that the Schalieinrichiung blocks during the I linlaul period of the electron beam and during the return period opens. Such a deflection circuit lsi from the I) T-OS 21 Jl 107 known. This diversion circle hai / ur generation of the required deflection current, a low-voltage source effective during the circulation and a Hole voltage source effective during retraction. To improve the current waveform is a Capacitor is provided which supplies an additional voltage during part of the recovery period Due to the necessary use of two voltage sources, you get! a relatively large amount of noise and thus a low level of efficiency. The invention is based on the object of improving the deflection circuit of the aforementioned gain in such a way that when only a single "voltage source" is used, the highest possible degree of efficiency is achieved with little switching effort. This object is achieved according to the invention in that the switching device is the memory device disconnects from the voltage source for discharge via the amplifier during the Hinlaul 'period and during the flyback period through a voltage transmission path bridged to the amplifier, and that the storage device has capacitors, the first switches in series during the retrace period and second switches during the trace period Switches can be connected in parallel. Due to this design, the use of only one voltage source is sufficient. because the low voltage required during the Hinlaul 'period in this period is supplied by the charge storage device. The invention is explained below with reference to FIG through 8, for example. It shows Fig. 1 is a sound image of a known deflection circle with an output stage in the form of a push-pull amplifier with single-ended output, F i g. 2A to 2C show the course of signals to explain the operation of the circuit in FIG. I, 3 shows a circuit diagram of an embodiment of a Deflection circle according to the invention, Fig. 4Λ to 4F the course of signals to explain the operation of the embodiment of Invention in FIG. 3, F i g. 5 is a visual image of part of a modification the embodiment of the invention in FIG. 3, F i g. 6 and 7 are circuit diagrams of further embodiments of deflection circuits according to the invention and Fig. 8 is a waveform for explaining the Operation of the embodiment of the invention in FIG. 7. 1 shows part of a known vertical deflection circuit with an output stage in the form of a push-pull amplifier with a single-ended output. In the figure, 1 denotes a push-pull amplifier with a single-ended output, which has two transistors Q \ and Q ₂ , which form an output stage. A driver signa! S \ with