Patents by Inventor Hermann Zierhut
Hermann Zierhut has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6445239Abstract: A bus coupling includes an amplitude-controlled transmission circuit for generating a substantially rectangular active pulse for a transmission pulse including an active pulse and an equalizer pulse for a bus system which guides alternating voltage data and direct voltage in order to prepare a vehicle wiring system voltage for user terminals, in particular for the bus of the European Installation Bus Association. The transmission circuit operates with a transmission circuit operates with a transmission stage which includes as a transmission transistor, a transmission valve functioning as a transistor in the transmission circuit. Depending on the function, the selection line of this transmission circuit is reduced in terms of the control signal by a transistor of the inverse type to the transistor in the collector circuit as reducing transistor.Type: GrantFiled: January 31, 2000Date of Patent: September 3, 2002Assignee: Siemens AktiengesellschaftInventor: Hermann Zierhut
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Patent number: 6172515Abstract: Bus coupler for transformer-free transmission onto a bus appertaining to building system technology, in particular the European Installation Bus Association, (“EIBA”) said bus carrying information, comprising active pulse and equalizing pulse, and energy. It is provided that the transmission valve of a transmission signal generator, in accordance with the function, is connected to at least one bus conductor via a capacitance, which is small relative to an imaginary capacitance acting as a short circuit for the active pulses of the information, it being the case that in a Miller circuit, in accordance with the function essentially further comprising a transistor, and a drive resistor, and two current amplifier circuits, this small capacitance is transformed into a sufficiently large capacitance in order to transmit active pulses in a sufficiently loss-free manner, and energy storage for the purpose of generating the equalizing pulse being effected in a further capacitance.Type: GrantFiled: November 22, 1999Date of Patent: January 9, 2001Assignee: Siemens AGInventor: Hermann Zierhut
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Patent number: 6049447Abstract: A device for limiting overload currents using a semiconductor element with at least one controllable semiconductor having an electron source (source), an electron acceptor (drain) and a control electrode (gate) controlling the electron flow, which device has characteristic curves typical of a field-effect transistor (FET). In the case of alternating voltage, two FETs are connected in series, in complementary fashion. Arrangement is provided for internally obtaining the control voltage required for driving the semiconductor element from at least part of the load current and/or from at least part of the voltage drop across the semiconductor element.Type: GrantFiled: August 4, 1998Date of Patent: April 11, 2000Assignee: Siemens AGInventors: Helmut Roesch, Hermann Zierhut
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Patent number: 6046516Abstract: An electronic switch with a switching element of the type of a semiconductor switch with the mode of operation of at least one FET, so that due to the technology it also has an internal body diode in inverse operation. A control circuit for executing the operating commands is set up so that gate in inverse operation receives such a voltage that the body diode is still currentless. In addition, a functional unit of the control circuit is set up to cause the switching element to assume the ON conducting state as a function of a commutation voltage or a commutation current, i.e., in inverse operation.Type: GrantFiled: October 14, 1997Date of Patent: April 4, 2000Assignee: Siemens AktiengesellschaftInventors: Reinhard Maier, Hermann Zierhut, deceased, Heinz Mitlehner
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Patent number: 5999387Abstract: A device for limiting overload currents by means of a semiconductor element with at least one controllable semiconductor having an electron source (source), an electron acceptor (drain) and a control electrode (gate) controlling the electron flow, which device has characteristic curves typical of a field-effect transistor (FET). In the case of alternating voltage, two FETs are connected in series, in complementary fashion. Means are provided for internally obtaining the control voltage required for driving the semiconductor element from at least part of the load current and/or from at least part of the voltage drop across the semiconductor element.Type: GrantFiled: July 8, 1996Date of Patent: December 7, 1999Assignee: Siemens AktiengesellschaftInventors: Helmut Roesch, Hermann Zierhut
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Patent number: 5943366Abstract: Method and device for generating bit information in a subscriber station of a bus system, in particular of the bus of the EIBA, essentially symmetrical AC voltage information being superposed as bit information on a DC voltage of the bus in that a DC voltage potential (19) of a line under inductive loading (9) is pulled, in each case in an active pulse (20) to the potential of another line and an equalizing pulse (22, 23) is formed with subsequent energy recovery. It is provided that the active pulse (20) of the bit information at a bit frequency is formed from individual pulses (17) of higher frequency.Type: GrantFiled: February 6, 1998Date of Patent: August 24, 1999Assignee: Siemens AGInventor: Hermann Zierhut, deceased
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Solid-state switching element with two source electrodes and solid-state switch with such an element
Patent number: 5880506Abstract: A solid-state switching element that works with at least one semiconductor region or a pair of antiserially arranged semiconductor regions having characteristic curves similar to those of FETs. An internal body diode in inverse operation is also provided. In addition to having a drain and a gate, each of the semiconductor regions has two source electrodes, with several cells combined with the electrodes in cell design. One source serves as a load current electrode, called a load source, and the other source is available as a gate electrode, called a control source. The effective semiconductor region of the load source is larger than the effective semiconductor region of the control source.Type: GrantFiled: October 14, 1997Date of Patent: March 9, 1999Assignee: Siemens AktiengesellschaftInventors: Reinhard Maier, Hermann Zierhut, deceased, Heinz Mitlehner, Ingeborg Zierhut -
Patent number: 5808327Abstract: An AC power controller includes at least two semiconductor regions reverse-connected in series. Each semiconductor region has an electron donor (source), an electron sink (drain) and an electron flow control electrode (gate) with characteristic curves such as those exhibited by FETs. Each semiconductor region also has an internal body diode. The gate-source voltage of a respective semiconductor region in the forward direction is set to be large enough to establish a desired limiting of the drain-source current. Yet, the gate-source voltage of the semiconductor region in the inverse mode is set to be large enough for the body diode to remain de-energized.Type: GrantFiled: March 8, 1996Date of Patent: September 15, 1998Assignee: Siemens AktiengesellschaftInventors: Reinhard Maier, Heinz Mitlehner, Hermann Zierhut
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Patent number: 5801583Abstract: A device for supplying the on-board system voltage in a bus coupler without a repeater, for coupling to an information and power carrying bus of a bus system, in particular for building systems management. The device includes a coupling circuit having a control input connected to a triggering circuit having inputs for a control criterion. The coupling circuit operates as a constant current source at communications frequencies and as a control circuit together with a triggering circuit at lower frequencies, such as those caused by power consumption. The coupling circuit is effectively connected in series with a reservoir capacitor for tapping the on-board system voltage. The series connection is effectively connected to the bus drivers.Type: GrantFiled: July 25, 1997Date of Patent: September 1, 1998Assignee: Siemens AktiengesellschaftInventor: Hermann Zierhut
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Patent number: 5621344Abstract: In a circuit arrangement for coupling a first signal into a second electric signal formed as an alternating signal, a device is provided for compensating for effects of the coupling on the signal pattern of the second signal, particularly on the "pulse tilt" of the second signal. In a preferred variant of the circuit arrangement, the coupling is inductive, whereby the compensation device comprises a capacitively functioning element. The circuit arrangement is particularly suited for coupling a direct-voltage signal into an alternating-signal bus.Type: GrantFiled: December 3, 1991Date of Patent: April 15, 1997Assignee: Siemens AktiengesellschaftInventor: Hermann Zierhut
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Patent number: 5546419Abstract: Bus coupler operates with a transformer and a comparator which is connected downstream in the signal-processing branch. The comparator threshold is raised as a function of the signal in the case of larger signals relative to small signals.Type: GrantFiled: July 28, 1993Date of Patent: August 13, 1996Assignee: Siemens AktiengesellschuftInventor: Hermann Zierhut
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Patent number: 5459429Abstract: A drive circuit for triggering a symmetrical bipolar transistor, the drive circuit having a balanced circuit connected to two operating electrodes of the symmetrical bipolar transistor. The balanced circuit includes two parts connected by their bases. Collectors of the two parts of the balanced circuit act on inverse balanced circuits which control a switching device which in turn controls the triggering of the symmetrical bipolar transistor.Type: GrantFiled: January 17, 1995Date of Patent: October 17, 1995Assignee: Siemens AktiengesellschaftInventor: Hermann Zierhut
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Patent number: 5153448Abstract: An information separation device that having a transformer operating as a separating filter to separate alternating voltage information and transmitted direct current power. The transformer has at least one winding on a first side coupled to the dc power. A capacitor is coupled to this winding, at whose ends direct current power is made available. The transformer has one winding on an information processing side. First and second valves are arranged in a transmitting branch parallel to the capacitor, the second winding being coupled at its first end between the first and second valves. Third and fourth valves are arranged in a branch parallel to the capacitor, the second winding being coupled in series at its first and second ends between the third and fourth valves in phase opposition to the first and second valves.Type: GrantFiled: January 16, 1990Date of Patent: October 6, 1992Assignee: Siemens AktiengesellschaftInventor: Hermann Zierhut
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Patent number: 5081440Abstract: A bus coupler for coupling transmitting and receiving stations to a two-conductor bus which feeds d-c current for coupling the on-board networks of the stations. It is designed for information traffic, for instance, with digital data transmission, for measuring and controlling and/or with analog signals for measuring and controlling and for speech transmission in that the information is superimposed as a completely symmetrical a-c voltage relative to a floating imaginary centralized ground, where the bus coupling comprises a switch for power and information which couples the information in and out, conductively separated from the power path.Type: GrantFiled: October 16, 1989Date of Patent: January 14, 1992Assignee: Siemens AktiengesellschaftInventors: Hans Ott, Hermann Zierhut
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Patent number: 5019730Abstract: An information separation device having a transformer operating as a separating filter to separate transmitted direct current power and alternating voltage information. The transformer has at least two windings on a first side holding power in reserve. Between these windings a capacitor is serially coupled that transmits information signals. The windings are coupled at their other ends to transmission lines for direct current power and alternating voltage information. The transformer has another winding on the second side that processes received information. Two controllable inverse valves are coupled by their output electrodes between the transmission lines. The control electrodes of the valves are coupled to a load-independent voltage source during a transmission signal.Type: GrantFiled: January 16, 1990Date of Patent: May 28, 1991Assignee: Siemens AktiengesellschaftInventor: Hermann Zierhut
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Patent number: 5020154Abstract: A transmission link for transmitting a sequence of signals comprising pulse and interval signals, across a transmission medium from a transmitter to a receiver circuit of a receiver, whereby each pulse signal is modulated with a frequency. At least two frequencies are used to modulate the pulses, and a separate evaluation circuit is provided in the receiver for each modulating frequency. The output signals of the evaluation circuits are concatenated (linked in series) by a AND-gate circuit.Type: GrantFiled: April 19, 1990Date of Patent: May 28, 1991Assignee: Siemens AktiengesellschaftInventor: Hermann Zierhut
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Patent number: 4827133Abstract: A circuit layout for an infrared space surveillance detector with a sensor and a field effect transistor following the sensor. An operational amplifier with a negative input is connected to the drain electrode of a field effect transistor. The output signal of the operational amplifier is fed back to its negative input. The stabilization of the operating voltage by the operational amplifier is utilized and the drain electrode of the field effect transistor may be supplied with a stable voltage, so that filtering of the operating voltage by a filter factor of 100 to 120 dB, that would otherwise be required, may be eliminated. It is possible further to apply a constant current and/or regulate the current supplied by utilizing the output signal of the operational amplifier to the source electrode of the field effect transistor.Type: GrantFiled: October 20, 1986Date of Patent: May 2, 1989Assignee: Richard Hirschmann Radiotechnisches WerkInventor: Hermann Zierhut
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Patent number: 4795905Abstract: A circuit layout operating in the current mode for an infrared room surveillance detector includes a high impedance operational amplifier connected directly to a pyroelement used as an infrared sensor. This results in a high sensitivity detector circuit with a low noise component in the detector output signal and maintaining a high impedance detector circuit. The detector circuit has a constant amplification over a relatively broad frequency range. The reaction resistor of the operational amplifier is chosen to have a high impedance, preferably in a range higher than 10.sup.11 Ohm. It is advantageous to take the reference voltage required for the evaluation of the detector output signal from the operational amplifier, so that aside from the simplified circuit layout, no further structural parts capable of increasing the interference sensitivity of the detector circuit are required.Type: GrantFiled: August 11, 1986Date of Patent: January 3, 1989Assignee: Richard Hirschmann Radiotechnisches WerkInventor: Hermann Zierhut
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Patent number: 4702449Abstract: A cardan ball suspension having a concentric strap relative to the ball or sphere to be adjusted. The strap exhibits a transverse slot. A radially protruding cog having a rectangular cross-section projects into the longitudinal slot and slides therein. The ball may be pivoted within a spherical angle zone without rotation of a surface element of the ball in relation to its normal or axis. The strap is preferably made of an elastic material and presses the ball against a holder ring.Type: GrantFiled: April 23, 1986Date of Patent: October 27, 1987Assignee: Richard Hirschmann Radiotechnisches WerkInventor: Hermann Zierhut
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Patent number: 4670655Abstract: An alarm system for the surveillance of space, with at least one sensor of electromagnetic, in particular infrared radiation, located on the closed inner frontal surface of a rectangular tube having mirror surfaces on its internal surfaces, the use of focusing means, such as lenses, concave mirrors, objectives, and the like, is avoided by that the sensor is essentially adjacent at least in one direction to the opposing mirror surfaces. This yields an alarm system that is highly compact, has small dimensions, and may be produced cost effectively. The sensor preferably consists of two spaced apart sensor elements operated in a push-pull mode.Type: GrantFiled: July 1, 1985Date of Patent: June 2, 1987Assignee: Richard Hirschmann Radiotechnisches WerkInventor: Hermann Zierhut