| 摘要 |
A temperature-compensated diode rectifier circuit is coupled to the outside of an HF amplifier (PA) to derive a rectified voltage (UD) from an HF output signal (RFOUT) with a rectifier input (IR) via a directional coupler (D-CO) with secondary connections (1, 2), and has a rectifier output (OR) for the rectified voltage (UD), a rectifier diode (D1), a charging capacitor (C1) and a ballast resistor (R2). To stabilize the rectified voltage against temperature influences, the rectifier input (IR) is connected to a d.c. input voltage (UIN), and a compensating diode (D2) is in series with the ballast resistor (R2), and a dropping resistor (R1) is in series with the rectifier diode (D1). According to the invention the rectifier diode (D1), the compensating diode (D2), the dropping resistor (R1), the ballast resistor (R2) and the directional coupler (D-CO) are connected to the d.c. input voltage (UIN) so that the voltage amplitude of the decoupled HF output signal (RFOUT) is added to the d.c. input voltage (UIN). Furthermore the dropping resistor (R1) of the rectifier diode (D1) is located between the charging capacitor (C1) and the rectifier output (OR) and the d.c. input voltage (UIN) is stabilized and is only slightly higher than twice the threshold voltage (UT) of a diode (D1, D2)
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