Patent ID: 6982601
Filing Date: 2006-01-03
Classification: H03F

Abstract:
1. A method to achieve a high isolation and high-speed buffer amplifier comprises: provide a means to split and to amplify the input signals in several parallel signal paths, a means to mirror the amplified signal to reduce the output load required and to increase the reverse isolation, a means to stabilize the operation, and a capacitor and an additional capacitor parallel to a resistor being hooked up to the node where several signal paths are combined, wherein said capacitors and said resistor are being used to set a frequency dependent gain and to define a frequency bandwidth; set a frequency dependent gain; set a frequency bandwidth; split an input signal in several paths; amplify the split signal in each signal path in several stages using source follower transistors; combine again the split and amplified signals; and mirror the amplified output current applying a multiplication factor.