Detection circuit and detection method
First Claim
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1. A detection circuit, comprising:
- a detector input;
a detector output;
a capacitive element coupled to the detector output;
a bias circuit comprising a first bias output configured to provide a first bias voltage and a second bias output configured to provide a second bias voltage;
a first diode element comprising a first node coupled to the detector input and a second node coupled to the first bias output; and
a second diode element comprising a first node coupled to the second bias output and a second node coupled to the capacitive element and to the second node of the first diode element.
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Abstract
A detection circuit includes a bias circuit configured to generate a first bias voltage and a second bias voltage. The detection circuit further includes a storage device configured to store a detection value corresponding to an amplitude of a radio frequency signal received at a detector input. A series connection of a first diode element and a second diode element includes first tap to receive the first bias voltage and the radio frequency signal, a second tap which is coupled to a connection node of the first and the second diode element to receive the second bias voltage and a third tap to provide the detection value.
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Citations
22 Claims
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1. A detection circuit, comprising:
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a detector input; a detector output; a capacitive element coupled to the detector output; a bias circuit comprising a first bias output configured to provide a first bias voltage and a second bias output configured to provide a second bias voltage; a first diode element comprising a first node coupled to the detector input and a second node coupled to the first bias output; and a second diode element comprising a first node coupled to the second bias output and a second node coupled to the capacitive element and to the second node of the first diode element. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A detection circuit, comprising:
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a bias circuit configured to generate a first bias voltage and a second bias voltage; a detector input configured to receive a radio frequency signal; a storage device configured to store a detection value corresponding to an amplitude of the radio frequency signal; a series connection of a first diode element and a second diode element, the series connection comprising a first tap to receive the first bias voltage and the radio frequency signal, a second tap which is coupled to a connection node of the first and the second diode element to receive the second bias voltage, and a third tap to provide the detection value. - View Dependent Claims (9, 10, 11, 12)
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13. A detection circuit, comprising:
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a detector input; a detector output; a bias circuit comprising a first bias output configured to provide a first bias voltage and a second bias output configured to provide a second bias voltage; a first capacitive element comprising a first node coupled to the detector input and a second node coupled to the second bias output; a second capacitive element comprising a first node coupled to the detector output and a second node which is coupled to a reference voltage tap; a first diode element comprising a first node coupled to the first bias output and a second node which is coupled to the second bias output; and a second diode element comprising a first node coupled to the second node of the first diode element and a second node coupled to the first node of the second capacitive element and the detector output. - View Dependent Claims (14, 15, 16, 17)
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18. A detection method, comprising:
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generating a first bias voltage and a second bias voltage; deriving a first intermediate signal as a function of the first bias voltage and a radio frequency signal; deriving a second intermediate signal by rectifying the first intermediate signal depending on the second bias voltage and an instantaneous value of the first intermediate signal; storing a detection value corresponding to an amplitude of the radio frequency signal; deriving a third intermediate signal by rectifying the second intermediate signal depending on the stored detection value and an instantaneous value of the second intermediate signal; and adjusting the stored detection value depending on the third intermediate signal. - View Dependent Claims (19, 20, 21)
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22. A detection method performed in an amplifier arrangement, wherein the amplifier arrangement comprises an amplifier circuit and a detection circuit, the detection circuit comprising a bias circuit configured to generate a first bias voltage and a second bias voltage, a series connection of a first diode element and a second diode element, the series connection receiving the first bias voltage and an amplified radio frequency signal at a first tap, receiving the second bias voltage at a connection node of the first and the second diode element and providing a detection value at a second tap to be stored in a capacitive element, the method comprising:
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generating the amplified radio frequency signal using the amplifier circuit as a function of a radio frequency signal; and deriving the detection value corresponding to an amplitude of the amplified radio frequency signal using the detection circuit.
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Specification