Apparatus and method for producing signals coded with amplitude shift keying
AssigneeEndress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG
InventorSven-Matthias Scheibe
Life of this patent
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Abstract
An apparatus for coding a signal by means of amplitude shift keying comprises a class E amplifier including a switching transistor, to whose gate is supplied a voltage having an operating frequency for operating the class E amplifier. For achieving an amplitude shift keying in the output signal of the class E amplifier, a circuit for switching the operating frequency of the voltage supplied to the gate of the switching transistor, or the resonance frequency of the class E amplifier, between a first value and a second value is provided and in order to switch a deviation degree between the operating frequency and the resonance frequency between a first value and a second value.
Claims12
An apparatus for coding an input signal by means of amplitude shift keying to an out-coupled reduction voltage resulting in a data transmission, comprising a class E amplifier having a resonance frequency (FR), including:
- a switching transistor, to whose gate a voltage is supplied with an operating frequency (FT) for operating the class E amplifier;
- and
- a circuit for switching the operating frequency (FT) of the voltage supplied to the gate of the switching transistor of said class E amplifier between a first operating frequency (FO) and a second operating frequency (F1), in order to switch a deviation degree, between the operating frequency (FT) and the resonance frequency (FR), between a first value and a second value, wherein:
- for implementing the amplitude shift keying, a frequency shift between the first operating frequency (FO) and the second operating frequency (F1) is performed in a clock rate of the data transmission, thus effecting the amplitude shift keying of the out-coupled reduction voltage.
A method for coding an input signal by amplitude shift keying to an out-coupled reduction voltage resulting in a data transmission, comprising a step of:
- supplying at least one operating frequency (FT) to a gate of a switching transistor of a class E amplifier, wherein the class E amplifier has at least one resonance frequency (FR);
- and
- switching a deviation degree between the operating frequency (FT) and the resonance frequency (FR), wherein:
- the deviation degree is defined as (FT−FR)/FR, and
- the switching of the deviation degree occurs by switching between a first operating frequency (FO) and a second operating frequency (F1) of the voltage supplied to the gate of the switching transistor, thus effecting an amplitude shift keying (ΔU) of the out-coupled reduction voltage (UA).
An apparatus for coding an input signal by means of amplitude shift keying to an out-coupled reduction voltage resulting in a data transmission, comprising a class E amplifier having a resonance frequency, including:
- a switching transistor, to whose gate a voltage is supplied with an operating frequency for operating the class E amplifier;
- and
- a circuit for switching the resonance frequency of said class E amplifier between a first resonance frequency and a second resonance frequency, in order to switch a deviation degree, between the operating frequency and the resonance frequency, between a first value and a second value, wherein:
- said gate of the switching transistor is operated with a fixed operating frequency, and, for switching the deviation degree, the resonance frequency of the class E amplifier is altered from the first resonance frequency to the second resonance frequency by connecting in, or out, a frequency influencing component.
A method for coding an input signal by amplitude shift keying to an out-coupled reduction voltage resulting in a data transmission, comprising a step of:
- supplying at least one operating frequency (FT) to a gate of a switching transistor of a class E amplifier, wherein the class E amplifier has at least one resonance frequency (FR);
- and
- switching a deviation degree between the operating frequency (FT) and the resonance frequency (FR), wherein:
- the deviation degree is defined as (FT−FR)/FR, and
- the switching of the deviation degree occurs by switching between a first resonance frequency (FR0) and a second resonance frequency (FR1) of the class E amplifier.
Dependencies are inferred from the claim text.