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Get this from a library! Elektronik ohne Ballast: Einf. Schaltungstechnik d. Industriellen Elektronik. [Otto Limann; Horst Pelka]. Funktechnik ohne Ballast. Elektronik + Physik Forum: 0. Rapidshare removed the account with the two bundles. I will be replacing the links soon.

At least one electronic voltage-dependent coupling element coupling said load to said oscillator that exhibits relatively high impedance at relatively low voltages and relatively low impedance at relatively higher voltages, said voltage-dependent coupling element comprising two Zener diodes connected back-to-back and in series such that for each polarity of voltage of said oscillator said voltage-dependent coupling element prevents current flow at voltages below breakdown voltages of said Zener diodes. BACKGROUND OF THE INVENTION The present invention is directed to oscillators. More particularly, the invention is directed to an oscillator having an electrical load coupled thereto. Oscillators having an electrical load coupled thereto are described in a book by Otto Limann, 'Elektronik ohne Ballast,' Franzis-Verlag GmbH, 1978, at pages 147-151.

At pages 162, 163, and 175 of the book, a voltage multiplier circuit in a high-voltage supply for an x-ray image intensifier is described. This multiplier circuit is an example of an electrical load that can be coupled to an oscillator. Often, the starting phase in an oscillator, or resonant circuit, is more critical than the steady state phase, i.e., maintenance of oscillation, once the oscillator has been started.

This is particularly true when circuit loading by the electrical load is greater during the start up phase than during steady state phase. In this situation, the oscillator can start up poorly or not at all. A situation where the oscillator starts up poorly can occur when a voltage multiplier circuit is coupled as an electrical load to the oscillator. The current required for charging capacitors of the high-voltage cascades of the voltage multiplier circuit is drawn away from the oscillator during the start up and stimulation phase. As a result, a reliable and fast stimulation of oscillations is not guaranteed. SUMMARY OF THE INVENTION The present invention provides an oscillator that easily starts-up and stimulates oscillations even when an electrical load is coupled thereto. To this end, the invention provides that a load is coupled to an oscillator via at least one voltage-dependent coupling element that reduces or precludes current drain from the oscillator to the load until the voltage of an output of the oscillator is sufficiently great.

In an embodiment, the invention provides that an electrical load be coupled to an oscillator via at least one voltage-dependent impedance element that exhibits high impedance at low voltages and low impedance at high voltages. As a result, load current cannot flow until the oscillator has started. In an embodiment, the voltage-dependent coupling element used to couple the load to the resonant circuit of the oscillator comprises two Zener diodes connected in series and with the anodes thereof coupled together. Download Toca Race Driver 3 Pc Ita Gratis here.

For example, given an x-ray image intensifier voltage supply, the Zener diodes can be connected in series between the high voltage cascade of the high voltage multiplier of the supply and the oscillator. Since the anodes of the Zener diodes are coupled together, the cathode of one diode is coupled to the oscillator while the cathode of the other diode is coupled to the voltage multiplier. The Zener diodes do not become conductive until the oscillator has started up and has stimulated oscillations to the extent that the peak voltage at the resonant circuit is as least as great as the avalanche-breakdown voltage of the diodes. Evangelisches Gesangbuch Pdf Writer. Given, for example, the use of a high voltage cascade as an electrical load coupled to an oscillator, only that amount of energy for charging the cascade can be drawn from the resonant circuit as can be resupplied while simultaneously maintaining the oscillatory peak voltage that is equal to the avalanche-breakdown voltages of the two Zener diodes. Thus, oscillation no longer ceases due to the connection of the load. Dell Inspiron 6400 Xp Windows Driver Recovery Cd Restore Disk.

Further, the Zener diodes conduct after every elevation of the cascade charging up to the complete charging of the cascade and remain open only when the oscillatory peak voltage is greater than the breakdown voltage and cascading charging voltage at the cascade input until the output voltage of the cascade has reached its ultimate value. The cascade is thereby charged without affecting start up of the oscillator. The above-described arrangement is far more advantageous than coupling an oscillator to an electrical load via a normal, current limiting voltage-independent resistor as described at page 175 of the aforementioned book of Otto Limann. This is because the internal resistance of the entire circuit does not increase toward the output due to the use of a resistor as the coupling element. In contrast, the internal resistance is hardly increased at all. In the start up phase, however, a high impedance coupling is provided by the Zener diodes because they are initially non-conductive. In another embodiment, instead of the two Zener diodes, a varistor that is connected between the oscillator and the electrical load can also be used as a voltage-dependent coupling element.