Patent ID: 7394316
Filing Date: 2008-07-01
Classification: H03F

Abstract:
1. Amplifying circuitry comprising: (a) a first input transistor including an emitter, a collector, and a base coupled to receive an input voltage; (b) a first adjustable current source circuit coupled between a first reference voltage and the emitter of the first input transistor; (c) a first current source coupled between a second reference voltage and the collector of the first input transistor; (d) first isolation circuitry having a first terminal coupled to an output terminal of the first adjustable current source circuit and a second terminal coupled to the emitter of the first input transistor; (e) first current follower circuitry coupled between the collector of the first input transistor and an input terminal of the first adjustable current source circuit; and (f) a first feed-forward capacitor coupled between the collector of the first input transistor and the first terminal of the first isolation circuitry.