Protection Module for RF-Amplifier
AssigneeST-Ericsson SA
InventorVincent Knopik
Life of this patent
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Abstract
A protection module (4) for a RF-amplifier (2) is efficient against overvoltage due to load impedance mismatch when said RF-amplifier is connected to a load RF-element (3). The protection module comprises a branch with at least one diode-like operating component (D1, D2, . . . , Dn) and a resistor (R2) which starts conducting when a RF-signal on a transmission link (6) between the RF-amplifier and the load RF-element is higher than a threshold set by the diode-like operating component. Such protection may be implemented in MOS technology only.
Claims16
A protection module for protecting a RF-amplifier against overvoltage due to load impedance mismatch when said RF-amplifier is connected to a load RF-element, said protection module having an input terminal able to connect to a node belonging to a RF-signal transmission link from the RF-amplifier to the load RF-element, and the protection module also having a reference terminal able to connect to a reference terminal of the RF-amplifier, said protection module comprising:
- a branch connecting the input terminal of the protection module to an intermediate node, said branch comprising at least one diode-like operating component;
- a first resistance and a first capacitor connected in parallel to one another between the intermediate node and the reference terminal of the protection module;
- and
- an inductor with a first terminal of said inductor connected to the input terminal of the protection module,
- wherein:
- the branch further comprises a second resistance connected in series with respect to the at least one diode-like operating component between the input terminal and the intermediate node of the protection module;
- and
- a second terminal of the inductor is connected to the intermediate node.
Dependencies are inferred from the claim text.