Common mode rejection circuit
First Claim
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1. An electrical circuit comprising:
- a circuit element configured to operate at a selected frequency within a variable frequency range that generates a common mode current for the selected frequency; and
a common mode rejection circuit element configured to reject the common mode current through the circuit element and the common mode rejection circuit element comprising;
a plurality of switchable inductors connected in series with one another, the plurality of switchable inductors collectively connected in parallel with a capacitor, wherein the plurality of switchable inductors are configured to have an inductance value as a function of the selected frequency of the circuit element and an operational mode parameter, wherein the operational mode parameter is a selected power input.
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Abstract
An electrical circuit includes a circuit element and a common mode rejection circuit element. The circuit element is configured to operate at a selected frequency within a variable frequency range and the common mode rejection circuit element is configured to reject a common mode current through the circuit element, wherein the common mode rejection circuit element is adjustable.
14 Citations
16 Claims
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1. An electrical circuit comprising:
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a circuit element configured to operate at a selected frequency within a variable frequency range that generates a common mode current for the selected frequency; and a common mode rejection circuit element configured to reject the common mode current through the circuit element and the common mode rejection circuit element comprising;
a plurality of switchable inductors connected in series with one another, the plurality of switchable inductors collectively connected in parallel with a capacitor, wherein the plurality of switchable inductors are configured to have an inductance value as a function of the selected frequency of the circuit element and an operational mode parameter, wherein the operational mode parameter is a selected power input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An oscillation device comprising:
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an oscillator configured to provide a variable oscillation frequency; and a common mode rejection circuit element connected to the oscillator in series and comprising a resonant circuit configured to reject a common mode current through the oscillator, wherein a resonance frequency of the resonant circuit is adjustable, the common mode rejection circuit element including a plurality of switchable inductors configured to have an inductance value as a function of the variable oscillation frequency and an operational mode parameter, wherein the operational mode parameter is a selected power input, wherein the oscillator comprises a differential amplifier, one or more inductors and an adjustable capacitor for selecting the oscillation frequency, wherein the adjustable capacitor is connected in parallel with the one or more inductors, wherein the differential amplifier comprises two differential transistor pairs which are coupled as push-pull stages, wherein a type of the transistors of a first differential transistor pair differs from a type of the transistors of a second differential transistor pair, wherein each transistor of the two differential transistor pairs is coupled with the other transistor of the respective differential transistor pair via a mutual feedback loop, and wherein the adjustable capacitor and the one or more inductors are connected between a common drain contact of a first push-pull stage and a common drain contact of a second push-pull stage. - View Dependent Claims (10, 11, 12)
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13. A method for operating an electrical circuit comprising a circuit element and a common mode rejection circuit element, the method comprising the following steps:
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operating the circuit element at a selected frequency within a variable frequency range; adjusting the common mode rejection circuit element based on the circuit element, wherein adjusting the common mode rejection circuit element comprises selectively switching one or more of a plurality of series-connected inductors of the common mode rejection circuit element to have an inductance value as a function of the selected frequency and an operational mode parameter, wherein the operational mode parameter is a selected power input; and rejecting a common mode current through the circuit element by use of the common mode rejection circuit element. - View Dependent Claims (14, 15)
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16. An electrical circuit comprising:
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a circuit element configured to operate at a selected frequency within a variable frequency range; and a common mode rejection circuit element configured to reject a common mode current through the circuit element, wherein the common mode rejection circuit element is adjustable and comprises a plurality of switchable capacitors connected in parallel to each other and to a switchable inductor for adjusting the resonance frequency, wherein an inductance value of the switchable inductor is adjustable as a function of the selected frequency and an operational mode parameter, wherein the operational mode parameter is a selected power input.
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Specification