Electrical circuit having a controllable oscillator
First Claim
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1. An electrical circuit comprising:
- a controllable oscillator configured to generate an oscillating signal;
a transmission line connected to an output of the oscillator, the transmission line having a length which is a fraction of a wavelength of the oscillating signal; and
a control loop configured to detect a difference between a first value of a signal parameter of the oscillating signal and a second value of the signal parameter of the oscillating signal having passed the transmission line, and to control the controllable oscillator in accordance with the difference.
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Abstract
An electrical circuit including a controllable oscillator, a transmission line and a control loop. The controllable oscillator is configured to generate an oscillating signal. The transmission line is connected to an output of the oscillator, wherein the transmission line has a length which is a fraction of a wavelength of the oscillating signal. The control loop is configured to detect a difference between a first value of a signal parameter of the oscillating signal and a second value of the signal parameter of the oscillating signal having passed the transmission line. Furthermore, the control loop is configured to control the controllable oscillator in accordance with the difference.
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Citations
26 Claims
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1. An electrical circuit comprising:
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a controllable oscillator configured to generate an oscillating signal; a transmission line connected to an output of the oscillator, the transmission line having a length which is a fraction of a wavelength of the oscillating signal; and a control loop configured to detect a difference between a first value of a signal parameter of the oscillating signal and a second value of the signal parameter of the oscillating signal having passed the transmission line, and to control the controllable oscillator in accordance with the difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An electrical circuit comprising:
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a controllable oscillator configured to generate an oscillating signal; a transmission line connected to an output of the oscillator, the transmission line having a length which is a fraction of a wavelength of the oscillating signal; and a control loop comprising a mixer, which is connected to an input port and an output port of the transmission line, and a control circuit; wherein the mixer is configured to combine the oscillating signal tapped from the input port with the oscillating signal tapped from the output port such that a difference between a first value of a signal parameter of the oscillating signal and a second value of the signal parameter of the oscillating signal having passed the transmission line is detectable; wherein the control circuit is configured to control the controllable oscillator in accordance with the difference via a control signal.
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20. An electrical circuit comprising:
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a controllable oscillator configured to generate an oscillating signal; a transmission line connected to an output of the oscillator, the transmission line having a length which is a fraction of a wavelength of the oscillating signal; a control loop comprising a mixer, which is connected to an input port and an output port of the transmission line, and a control circuit; and a calibration circuit comprising a look-up table and a digital-to-analog converter; wherein the digital-to-analog converter is configured to output a calibration signal to the mixer in accordance with calibration data stored in the look-up table; wherein the mixer is configured to combine the calibration signal, the oscillating signal tapped from the input port and the oscillating signal tapped from the output port such that a difference between a first value of a phase of the oscillating signal and a second value of the phase of the oscillating signal having passed the transmission line is detectable; wherein the control circuit is configured to control the controllable oscillator in accordance with the difference via a control.
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21. An electrical circuit comprising:
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a controllable oscillator configured to generate an oscillating signal; means for transmitting the oscillating signal through a transmission line such that a signal parameter of the oscillating signal is changed; and a control loop configured to detect a difference between a first value of the signal parameter and a second value of the signal parameter, and to control the controllable oscillator in accordance with the difference. - View Dependent Claims (22, 23)
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24. A method for controlling a controllable oscillator which is configured to generate an oscillating signal, comprising the steps:
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transmitting the oscillating signal through a transmission line which is connected to an output of the oscillator, wherein a length of the transmission line is a fraction of a wavelength of the oscillating signal; detecting a difference between a first value of a signal parameter of the oscillating signal and a second value of the signal parameter of the oscillating signal having passed the transmission line; and controlling the controllable oscillator in accordance with the difference. - View Dependent Claims (25, 26)
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Specification