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US 6,856,201 B2Granted
Method to reduce unwanted oscillations in high speed, high gain or transimpedance amplifiers
AssigneeBroadcom Corporation
InventorSandeep K. Gupta
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Abstract
A system reduces unwanted oscillations in a multiple gigabit per second, high gain amplifier portion. The system includes a power source portion having a pluraty of power sources and a bias current portion having a pluraty of bias current devices. The system also includes an amplification portion having a plurality of amplifiers. A first group of the plurality of amplifiers is coupled to the power source portion and the bias current portion, such that feedback voltage is substantially eliminated to substantially eliminate oscillations in the amplification portion.
Claims20
A method, comprising:
- coupling a plurality of bias current devices in a bias current portion to corresponding ones of a plurality of power sources in a power source portion;
- coupling a first group of a plurality of amplifiers in an amplification portion to said power source portion and said bias current portion;
- and
- substantially eliminating parasitic paths from outputs of said plurality of amplifiers to inputs of said plurality of amplifiers to substantially eliminate oscillations in said amplification portion.
1 more element
Dependencies are inferred from the claim text.