DE1673777A1 - Circuit arrangement for contactless control of a mechanical oscillator - Google Patents

Description

30JMUS7 0-SIEMENS AKTIEEGESEILSGHAPT Munich 2,

Wittelsbaeherplati 2 VPA 67 / 2,321

Circuit arrangement for contactless control of a mechanical oscillator .

The invention relates to a circuit arrangement for contactless control of a mechanical oscillator as a gear folder a time-keeping device, for example a pendulum or balance wheel, a clock, with a magnet system and a drive coil, which relative movements can perform against each other, such that, for example, the drive coil in the magnetic field of the

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New document ·. '! (Art. 7, Paragraph 1, Paragraph 2, No. 1, Clause 3 of the «Moderungege» of September 4, 1987)

109809/0700

BATH

ΡΛ 9/491 / M 67a - 2nd

Magnctsyütomo swings, and raises the drive Gpulc in astable cultivator containing its starting circuit, from a chain circuit of a drive transistor, in deacon Kolloktorkreis the control coil is and cineG to the Antricostransistor complementary control transistor, with one each Koppelzv / oig provided by the collector on the base of the transistors and the coupling branch of the collector of the drive transistor on the base of the control transistor a time-determiningc Capacity includes .. "

A circuit arrangement of the aforementioned type is known. With such a circuit arrangement, the in output circuit dec astable multivibrator lying drive coil on the one hand to maintain the movement of the necha-

Nischon Schwingers supplied the necessary energy on the other hand is induced by the movement in the drive mechanism electromotive force is used to control and synchronize the astable multivibrator. - -:. "'

. "."

Control signal only for triggering * deo. Impulse pulse and not used for proportional control of the glberi * Eo, instead, pulses of the same length and intensity are always generated, which are independent of the pendulum or restlessness and are therefore strictly symmetrical to the zero point only with a certain oscillation width. It also iet _one:; ' Circuit arrangement has become known in which the control pulse is not only used to synchronize an astabi ^ cn multivibrator

109809/07 0 0 ν- ': ''j : -3 - ' BAD ORIGINAL

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used, but is also used for a real proportional control of the driving pulse · In this circuit arrangement, the above-mentioned astable multivibrator is extended by a bridge curvature in the drive flow, whereby the control coil belongs to this bridge arrangement. The control transistor lies with its starting circuit which is the zero branch of the bridge. By this circuit arrangement ^ we the _; Recovery of the control pulse normally covered by the drive sirapulse enables »: ν:;. - ^ -. ^; ' ^v

The disadvantage of the aforementioned circuit arrangement, however, is that the bridge arm is on one side - the emitter - of the input circuit of the control port is connected by one part of the load current is flowing through it and therefore an increased Power consumption results. On the other hand, a directly proportional recovery of the control impulse is not at all *

ι · · -.-.- - '. ■ "■ · ■ ·: ■:. <=.: - i -. ·> ■ - ·. · -.-.- ■■ - ■. ■■ required »but it is sufficient to provide a partial

filtering of the drive pulse. ^ * ■ ^ fi->' ^: '/''.'/-

The present invention is based on the object of specifying a circuit arrangement for the contact control of a mechanical oscillator, in which the disadvantages described in the foregoing have been avoided. . ^;

In order to solve the above-mentioned problem, there is a circuit arrangement of the type mentioned according to the invention '' '". a. Ohmic voltage divider, .in the collector · emitter circuit of the Tax transit gates have a special look

Implementation of the invention, the voltage divider in Collector-Enittorszweig of the control transistor through a Resistance in the collector branch and a resistor in emitter white or by a resistance in the collector branch and the Base-emitter circuit deo drive transistor are formed.

Further details of the invention result from * the following Description of an exemplary embodiment based on the figure.

In the. Figure is an astabilier multivibrator with a daisy chain connection of two complementary transistors T ₁ and I «is shown. The transistor T ₁ forms the control transistor, while the transistor T _{2 forms} ^the drive transistor. In the collector circuit of the drive transistor there is a resistor Rg and a drive coil S. The gosamto series connection auo 'drive coil S, resistor Rg and collector-emitter path of the drive transistor Tp is connected to terminals 1 and 2 at the battery voltage, with terminal 1 being positive opposite in this example of terminal 2 is. A feedback branch leads from the drive coil via a resistor Rc and a capacitor C ₁ to the base of the control transformer T ₁ , which is at the same time connected to the terminal _{via a resistor R 1.}

According to the invention, an ohmic voltage divider R ^, R ^ is now provided in the collector-emitter circuit of the SteuertrcnBistors T ₁ , the resistor Rg in the emitter circuit and the

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Resistance R * in the Koilektorkreio

To explain this circuit arrangement, it is first mentioned that at the time of triggering the drive pulse, the collector voltage of the drive power supply unit jumps by approximately the amount of the battery voltage at terminals 1 and 2. The full size of this voltage reduction is transmitted via the feedback capacitance CJ and therefore causes the control transistor to be completely overdriven. Since the control impulse is always much smaller than the drive impulse i3t, one cannot speak of a real control *. The drive pulse decays after a time constant given by the RC element 0, R ₁ and is not dependent on the control pulse.

Due to the voltage divider in the collector-emitter circuit of the control transistor, the voltage jump of the collector of the drive transistor T ₂ cm emitter of the control transistor T ₁ is now also approximately obtained. Therefore, the sturgeon "·", "Rende portion of the drive pulse is of cbm control pulse is superimposed, subtracted and" rendered ineffective for the modulation of the oscillator _Εο Λ remains daheir, -. Zv / ischenVBasis and emitter of Stcvortransistors T ₁ im.wesentlichen only Control pulse effective. ". . ''

Since the voltage divider Rg, R »is not in the output loop, but is located in the control circuit, this can have a higher resistance dimensioned and therefore battery power has been saved. the Practice shows, moreover, that the Diineneionierung ae's Seiler

PA 9/491 / 1167a -6- 16737Τ7

allows higher tolerances. With such a drive * Circuit arrangement for clocks is about 30 # smaller drive currents, which not least has an effect on the speed quality. .

So that the control pulse is not short-circuited by the drive transistor during pulsing, d3r invention collector Emitterkreio according to the Antriebstransistoro T ^"G * ⁿ resistance provided" a development. This function can be either the resistance Rg in Kolloktorzweig or a resistor R 'in Take over the emitter circuit. To indicate both possibilities in the law, the resistance R «is indicated by a dashed line _{in the emitter circuit of the transistor T 2.}

It should also be noted that the resistance R ^ in the feedback zone from the drive coil S to the Baoio (iod Control transistor T «can be omitted. This resistance too is therefore shown in dashed lines.

4 claims
1 figure

Claims (3)

ΡΛ 9/491 / 1167a - 7 - 1673777 patent claims 1. A circuit arrangement for the contactless Steuerung'eines mechanical S _c hwingers alo transition folder of a zeithalfcnden device, in particular Uforuh or pendulum of a clock, with a magnet system and a driving coil which Rclativbewegungen can run against each other, such that for example, the Antriebsspulo of the vibrator in the magnetic field Magnet system oscillates, and with an astable multivibrator containing the drive coil in its output circuit from a chain circuit of a drive transistor, in whose collector circuit the drive coil is located, and a control transistor complementary to the drive transistor, a coupling branch from collector circuit to the base of the transistors being provided and the coupling branch contains a time-determined capacitance from the collector of the drive transistor to the base of the control transistor, characterized by an ohmic voltage divider in the Kpllektor-rmitterkreis of the control transistor. 2 «circuit arrangement according to claim 1, characterized in that that the voltage divider in the collector-ünitterzweig of the control transistor is formed by a resistor in the collector branch and a resistor in the emitter branch. 3. Circuit arrangement according to claim 1, characterized in that the voltage divider in the collector-emitter branch of the control transistor by a Y, * resistance in its collector white * Vrär # 3? LlQ? 8Q9 / O7OQ * BADORtGtHAL "-8- and formed the base circuit of the drive transistor is. \\ o ± claim 3, characterized in that there is provided * 4 * Circuit arrangement according to one in the collector-ITinittorkreio deo Steucrtraneiotoro a ohniBcher resistance. • ■ '■■ X 109809/0700 ■ "■ '-fiujPQ BATH