Electrical signal amplifier, circuit arrangement and method

A method for amplifying an electrical signal by means of an electrical signal amplifier, comprising:

• receiving an electrical input signal at an amplifier input of an electrical signal amplifier,
• amplifying the electrical input signal by means of an amplifier circuit arranged between the amplifier input and an amplifier output, wherein the amplifier circuit comprises an amplifier stage comprising a transistor arrangement having a series circuit, wherein:
• a first end contact at one end of the series circuit of the transistor arrangement is connected to the amplifier output, the first end contact being a drain contact,
• the drain contact and the source contact of adjacent transistors are interconnected in the transistor arrangement,
• a second end contact at an opposite end of the series circuit of the transistor arrangement is connected to a ground, the second end contact being a source contact;
• and
• a voltage divider circuit is connected downstream of the amplifier input, wherein the voltage divider circuit is provided with capacitive circuit elements and couples the electrical input signal to gate contacts of the transistor arrangement, and
• providing the amplified electrical signal as an electrical output signal via the amplifier output, and
• wherein, at least in the case of an overload, an input voltage applied at the amplifier input is divided by means of the voltage divider circuit into voltage portions, each of which is passed via an output of the voltage divider circuit to the gate contacts of the transistor arrangement, and a supply voltage is set at the gate contacts by means of a gate-voltage supply circuit, which is connected to the gate contacts of the transistor arrangement.