| 摘要 |
<p>A limiter circuit comprises a first impedance network (R1) coupled between an input and an output of the limiter circuit, and at least one clipping branch (R2, D2, A, D1) also coupled between an input and an output of the limiter circuit. The clipping branch (R2, D2, A, D1) includes a differential amplifier (A) having a non-inverting input coupled to receive a clip voltage, a second impedance network (R2) coupled between the limiter circuit input and an inverting input of the differential amplifier (A), where the first and second impedance networks (R1, R2) have substantially corresponding impedance values, a first p-n junction (D1) between an output of the differential amplifier (A) and the limiter circuit output, and a second p-n junction (D2) between the inverting input and the differential amplifier output, where a layer (p or n) of said second p-n junction (D2) which is coupled to the differential amplifier output corresponds to a layer (p or n) of the first p-n junction (D1) which is coupled to the differential amplifier output, and wherein the first and second p-n junctions (D1, D2) are substantially identical.</p> |
