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US 8,013,638 B2Granted
Circuit for the generation of pulse-width modulation signals, particularly for a satellite reception system
AssigneeSTMicroelectronics S.r.l.
InventorsSergio Riccardo Mauro, Sergio Fabiano
Life of this patent
Estimating the term…
Abstract
An embodiment of regulation and shaping circuit includes a first input terminal for receiving a first input signal with a first frequency; a second input terminal for receiving a second input signal with a second frequency higher than the first frequency; a first circuital branch coupled to the first input terminal and, through first coupling means active at the first frequency, to an output terminal for providing an output signal; a second circuital branch coupled to the second input terminal and to the output terminal, wherein said second circuital branch comprises a negative feedback circuital loop adapted to control the output signal according to the second input signal.
Claims41
A regulation and shaping circuit comprising:
- a first input terminal for receiving a first input signal with a first frequency;
- a second input terminal for receiving a second input signal with a second frequency higher than the first frequency;
- a first circuital branch coupled to the first input terminal and, through first coupling circuit that reacts in a first manner to a signal at the first frequency and reacts in a second manner to a signal at the second frequency, coupled to an output terminal for providing an output signal;
- a second circuital branch coupled to the second input terminal and to the output terminal,
- wherein said second circuital branch includes a negative feedback circuital loop adapted for controlling the output signal according to the second input signal.
2 more elements
A regulation and shaping circuit comprising:
- a first input terminal for receiving a first input signal with a first frequency;
- a second input terminal for receiving a second input signal with a second frequency higher than the first frequency;
- a first circuital branch coupled to the first input terminal and, through first coupling circuit that is active at the first frequency, coupled to an output terminal for providing an output signal;
- a second circuital branch coupled to the second input terminal and to the output terminal,
- wherein said second circuital branch includes a negative feedback circuital loop adapted for controlling the output signal according to the second input signal;
- wherein said first coupling means includes at least one inductor which has a first terminal coupled to the first circuital branch and a second terminal coupled to the output terminal, said inductor being connected in parallel to a resistor.
3 more elements
A regulation and shaping circuit comprising:
- a first input terminal for receiving a first input signal with a first frequency;
- a second input terminal for receiving a second input signal with a second frequency higher than the first frequency;
- a first circuital branch coupled to the first input terminal and, through first coupling circuit active at the first frequency, coupled to an output terminal for providing an output signal;
- a second circuital branch coupled to the second input terminal and to the output terminal,
- wherein said second circuital branch includes a negative feedback circuital loop adapted for controlling the output signal according to the second input signal
- wherein the feedback circuital loop comprises a differential amplifier and an output circuit, said differential amplifier having a non-inverting input terminal coupled to the second input terminal and an inverting input terminal coupled to the first output terminal of the output circuit;
- and
- wherein the output circuit comprises a push-pull stage.
5 more elements
A method of generating an electric signal at an output terminal of a circuit, the method comprising:
- transferring onto the output terminal a first input signal having a first frequency,
- applying to the output terminal a signal corresponding to a second input signal at a second frequency higher than the first frequency, said applying being performed by a negative feedback control circuital loop;
- wherein said transferring is substantially inhibited at said second frequency when compared to the first frequency.
A circuit, comprising:
- a first circuit input node operable to receive a first reference signal;
- a second circuit input node operable to receive a first communication signal;
- a circuit output node;
- a reference generator coupled to the first input node, operable to generate on the output node a second reference signal in response to the first reference signal, and having at the output node an impedance that increases with frequency;
- and
- a communication-signal generator coupled to the second input node, operable to superimpose on the second reference signal a second communication signal in response to the first communication signal, and having at the output node an impedance that decreases with frequency.
3 more elements
A circuit, comprising:
- a first circuit input node operable to receive a first reference signal;
- a second circuit input node operable to receive a first communication signal;
- a circuit output node;
- a reference generator coupled to the first input node, operable to generate on the output node a second reference signal in response to the first reference signal, and having at the output node an impedance that increases with frequency;
- and
- a communication-signal generator including a differential amplifier having a first amplifier input node coupled to the second circuit input node, a second amplifier input node, and an amplifier output node coupled to the circuit output node and to the second amplifier input node.
3 more elements
An integrated circuit, comprising:
- a first circuit input node operable to receive a first reference signal;
- a second circuit input node operable to receive a first communication signal;
- a circuit output node;
- a reference generator coupled to the first input node, operable to generate on the output node a second reference signal in response to the first reference signal, and having at the output node an impedance that increases with frequency;
- and
- a communication-signal generator coupled to the second input node, operable to superimpose on the second reference signal a second communication signal in response to the first communication signal, and having at the output node an impedance that decreases with frequency.
3 more elements
An integrated circuit, comprising:
- a first circuit input node operable to receive a first reference signal;
- a second circuit input node operable to receive a first communication signal;
- a circuit output node;
- a reference generator coupled to the first input node, operable to generate on the output node a second reference signal in response to the first reference signal, and having at the output node an impedance that increases with frequency;
- and
- a communication-signal generator including a differential amplifier having a first amplifier input node coupled to the second circuit input node, a second amplifier input node, and an amplifier output node coupled to the circuit output node and to the second amplifier input node.
3 more elements
A system, comprising:
- a first integrated circuit, comprising
- a first circuit input node operable to receive a first reference signal,
- a second circuit input node operable to receive a first communication signal,
- a circuit output node,
- a reference generator coupled to the first input node, operable to generate on the output node a second reference signal in response to the first reference signal, and having at the output node an impedance that increases with frequency, and
- a communication-signal generator coupled to the second input node, operable to superimpose on the second reference signal a second communication signal in response to the first communication signal, and having at the output node an impedance that decreases with frequency;
- and
- a second integrated circuit coupled to the first integrated circuit.
5 more elements
A system, comprising:
- a first integrated circuit, comprising
- a first circuit input node operable to receive a first reference signal,
- a second circuit input node operable to receive a first communication signal,
- a circuit output node,
- a reference generator coupled to the first input node, operable to generate on the output node a second reference signal in response to the first reference signal, and having at the output node an impedance that increases with frequency, and
- a communication-signal generator including a differential amplifier having a first amplifier input node coupled to the second circuit input node, a second amplifier input node, and an amplifier output node coupled to the circuit output node and to the second amplifier input node;
- and
- a second integrated circuit coupled to the first integrated circuit.
5 more elements
A method, comprising:
- generating an output reference signal on a output node with a first circuit;
- superimposing an output communication signal on the output node with a second circuit;
- isolating the first circuit from the communication signal with a low-pass filter;
- and
- isolating the second circuit from the reference signal with a high-pass filter.
2 more elements
Dependencies are inferred from the claim text.