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US 5,969,568 AGranted
Power output element of an amplifier/transmitter
AssigneeSiemens Aktiengesellschaft
InventorMarkus Vester
Life of this patent
Estimating the term…
Abstract
A circuit to be used in a power amplifier element to achieve triggered bias control of one or several individual transistors in the amplifier element in relation to their individual tolerances. A control circuit is provided for each transistor, each control circuit being controlled by a common controller and including an integration circuit for suitable balancing of the different individual threshold voltages of each transistor.
Claims6
A device having a plurality of transistors connected in parallel, the device comprising:
- a controller, the controller generating a controllable potential and a switch control signal;
- and
- a plurality of control circuits, each of the plurality of control circuits being assigned to a corresponding one of the plurality of transistors and including:
- an integrator circuit, the integrator circuit having an output which is coupled to a gate of the corresponding one of the plurality of transistors and a first input coupled to the controllable potential, and
- a switch, the switch being coupled between a second input of the integrator circuit and a source of the corresponding one of the plurality of transistors and having a control input which is coupled to the switch control signal.
2 more elements
A device having one transistor, the device comprising:
- a controller, the controller generating a controllable potential and a switch control signal;
- and
- a control circuit, the control circuit controlling the transistor and including:
- an integrator circuit, the integrator circuit having an output which is coupled to a gate of the transistor and a first input coupled to the controllable potential, and
- a switch, the switch being coupled between a second input of the integrator circuit and a source of the transistor and having a control input which is coupled to the switch control signal.
2 more elements
Dependencies are inferred from the claim text.