×

Power amplifier for amplifying high-frequency (H.F.) signals

  • US 7,551,036 B2
  • Filed: 11/10/2005
  • Issued: 06/23/2009
  • Est. Priority Date: 11/23/2004
  • Status: Expired due to Fees
First Claim
Patent Images

1. A power amplifier for amplifying high frequency (HF) signals comprising:

  • several amplifier elements (T_1, . . . , T_4) each with an amplifier channel (DS) and a gate terminal (G) for controlling the amplifier channel (DS), whereby the amplifier channels (DS) of the amplifier elements (T_1, . . . , T_4) are connected in series;

    a supply voltage (U_d) for the amplifier elements (T_1, . . . , T_4) that is applied to the serial connection;

    a selectable potential (U_g) that is present at the gate terminal (G) of the first amplifier element (T_1) of the serial connection;

    an HF input (2) that is connected to the gate terminal (G) of the first amplifier element (T_1) of the serial connection via a first adjustment network (3);

    an HF output (5) that is connected to a drain (D) of the last amplifier element (T_4) of the serial connection via a second adjustment network (6);

    at least one capacitor (C_2, . . . , C_4) connected to ground potential, each at the gate terminal (G) of the second amplifier element (T_2) and to the last amplifier element (T_4); and

    at least one resistor (R_2, . . . , R_4), each between the gate terminals (G) of adjacent amplifier elements (T_1, T_2;

    T_2, T_3;

    T_3, T_4), at least one resistor (R_5) between the gate terminal (G) and the drain terminal (D) of the last amplifier element (T_4),characterized by at least one limiting path (7) that is connected between the drain terminal (D) and the gate terminal (G) of at least one amplifier element of the serial connection from the first amplifier element (T_1) to the next to the last amplifier element (T_3), whereby the limiting path (7) can be toggled between a conducting state and a blocking state corresponding to a voltage (U

    GD) that is present between the drain terminal (D) and the gate terminal (G) of the amplifier elements (T_1, . . . , T_3).

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×