Phase-stabilized, phase-coupled resonant circuit
First Claim
1. An apparatus for non-contacting signal and energy transmission between a substantially immobile part as a microstation and a mobile part as a microunit, the microstation having an oscillator operable to produce to an oscillation and having means for dividing the oscillation into two separate oscillations, means for forcing a phase shift on a first of the two separate oscillations relative to a second of said two separate oscillations depending upon a data stream, the phase shifted oscillation being supplied to the mobile part via a first coil pair and the other oscillation being supplied to the mobile part via a second coil pair and the power transmission ensuing via the same coil pairs with the assistance of the two oscillations, the mobile part having a phase comparator to which the transmitted oscillations are Supplied, the phase comparator acquiring the data from the data stream with reference to the phase shift and the data transmission from the mobile part to the immobile part ensuing on the basis of simultaneous load modification at both coils of the mobile part so that it is assured that documentation of the load variation is possible at one of the two coils of the microstation even given an interchanged allocation of the coil pairs, the improvement comprising:
- a first resonant circuit including a first inductance, a first capacitance, and a first capacitive diode, said first resonant circuit being resonant stabilized in a phase shifted fashion and having a voltage tap, a first transistor through which said first resonant circuit is driven by two coherent oscillations of fixed phase shift, said first transistor being connected in series with said first resonant circuit so that said resonant circuit acts as a real ohmic resistance resulting in a phase shift of exactly 180 degrees between an oscillation generating signal applied at a base of said first transistor and a signal at said voltage tap of said first resonant circuit when said first resonant circuit is in resonance and deviating from said 180 degree phase shift when said first resonant circuit is not in resonance;
a second resonant circuit having a second inductance, a second capacitance, and a second capacitive diode, said second resonant circuit being resonant stabilized in phase-shifted fashion;
a second transistor connected in series with said second resonant circuit;
logic elements connected to convert deviations from said 180 degrees phase shift into a series of pulses having a pulse-duty factor dependent on phase shift;
an R-C combination connected at an output of said logic elements to integrate said pulse-duty factor and produce a voltage value;
an operational amplifier connected to compare said voltage value to a standard value, an output of said operational amplifier connected to drive said first capacitive diodes to stabilize said first resonant circuit to a supply frequency;
a coherent phase-shifted part available as an oscillation generating signal being supplied to said second inductance of said second circuit;
said second resonant circuit being stabilized to the same frequency as said first resonant circuit so that both frequency stabilized oscillations have a defined phase shift relative to one another, the frequency stabilized oscillations being available frequency stabilized and phase shifted via said first and second inductances of the immobile part to allow recognition and evaluation of the phase shift and guaranteeing a time defined standardized BAUD rate of the data stream on the basis of the frequency stability.
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Accused Products
Abstract
In a system having a mobile part and an immobile part between which data and energy are transmitted, an electronic control for two resonant circuits serve the purpose of transmitting energy to the mobile part. The resonant circuits are driven so that their oscillations have a prescribed phase shift relative to one another. For data transmission to the mobile part, a phase shift is superimposed on the transmitted signal at one resonant circuit. On the basis of the phase relation of the signals relative to one another, the mobile part can identify which resonant circuit is transmitting the data. The oscillation of the resonant circuit that is transmitting new data via the phase shift is used for the formation of the clock signal on the part of the mobile part.
15 Citations
1 Claim
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1. An apparatus for non-contacting signal and energy transmission between a substantially immobile part as a microstation and a mobile part as a microunit, the microstation having an oscillator operable to produce to an oscillation and having means for dividing the oscillation into two separate oscillations, means for forcing a phase shift on a first of the two separate oscillations relative to a second of said two separate oscillations depending upon a data stream, the phase shifted oscillation being supplied to the mobile part via a first coil pair and the other oscillation being supplied to the mobile part via a second coil pair and the power transmission ensuing via the same coil pairs with the assistance of the two oscillations, the mobile part having a phase comparator to which the transmitted oscillations are Supplied, the phase comparator acquiring the data from the data stream with reference to the phase shift and the data transmission from the mobile part to the immobile part ensuing on the basis of simultaneous load modification at both coils of the mobile part so that it is assured that documentation of the load variation is possible at one of the two coils of the microstation even given an interchanged allocation of the coil pairs, the improvement comprising:
- a first resonant circuit including a first inductance, a first capacitance, and a first capacitive diode, said first resonant circuit being resonant stabilized in a phase shifted fashion and having a voltage tap, a first transistor through which said first resonant circuit is driven by two coherent oscillations of fixed phase shift, said first transistor being connected in series with said first resonant circuit so that said resonant circuit acts as a real ohmic resistance resulting in a phase shift of exactly 180 degrees between an oscillation generating signal applied at a base of said first transistor and a signal at said voltage tap of said first resonant circuit when said first resonant circuit is in resonance and deviating from said 180 degree phase shift when said first resonant circuit is not in resonance;
a second resonant circuit having a second inductance, a second capacitance, and a second capacitive diode, said second resonant circuit being resonant stabilized in phase-shifted fashion;
a second transistor connected in series with said second resonant circuit;
logic elements connected to convert deviations from said 180 degrees phase shift into a series of pulses having a pulse-duty factor dependent on phase shift;
an R-C combination connected at an output of said logic elements to integrate said pulse-duty factor and produce a voltage value;
an operational amplifier connected to compare said voltage value to a standard value, an output of said operational amplifier connected to drive said first capacitive diodes to stabilize said first resonant circuit to a supply frequency;
a coherent phase-shifted part available as an oscillation generating signal being supplied to said second inductance of said second circuit;
said second resonant circuit being stabilized to the same frequency as said first resonant circuit so that both frequency stabilized oscillations have a defined phase shift relative to one another, the frequency stabilized oscillations being available frequency stabilized and phase shifted via said first and second inductances of the immobile part to allow recognition and evaluation of the phase shift and guaranteeing a time defined standardized BAUD rate of the data stream on the basis of the frequency stability.
- a first resonant circuit including a first inductance, a first capacitance, and a first capacitive diode, said first resonant circuit being resonant stabilized in a phase shifted fashion and having a voltage tap, a first transistor through which said first resonant circuit is driven by two coherent oscillations of fixed phase shift, said first transistor being connected in series with said first resonant circuit so that said resonant circuit acts as a real ohmic resistance resulting in a phase shift of exactly 180 degrees between an oscillation generating signal applied at a base of said first transistor and a signal at said voltage tap of said first resonant circuit when said first resonant circuit is in resonance and deviating from said 180 degree phase shift when said first resonant circuit is not in resonance;
Specification
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- Resources
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Current AssigneeAngewandte Digital Elektronik GmbH
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Original AssigneeAngewandte Digital Electronik GmbH
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InventorsHass, Wolfgang, MacKenthun, Holger, Kreft, Hans-Diedrich
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Primary Examiner(s)Yusko, Donald J.
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Assistant Examiner(s)Magistre, Dervis
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Application NumberUS07/329,309Time in Patent Office421 DaysField of Search340/825.54, 340/825.71, 340/870.25, 340/870.31, 324/225, 324/226, 324/233, 235/449, 235/450, 235/474, 235/487, 235/492, 235/493US Class Current340/10.34CPC Class CodesG06K 7/10336 the antenna being of the ne...H04B 5/22 Capacitive couplingY02D 30/70 in wireless communication n...
