Gain-boosted opamp with capacitor bridge connection

Details Gain-boosted opamp with capacitor bridge connection Gain-boosted opamp with capacitor bridge connection

2006-09-26

2006-09-26

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S311000

Reexamination Certificate

active

07113039

ABSTRACT:
The number of compensation capacitors of an opamp may be reduced by connecting the compensation/decoupling capacitor element or elements between the load node and the bias node of the operational amplifier, rather than providing separate capacitive elements from each load node to ground (the reference voltage). This allows one to both reduce the overall area occupancy of the operational amplifier, and/or to improve the settling characteristics of its common-mode and differential output signal. The opamp may be part of a multi-stage amplifier or an analog-to-digital converter (ADC) (e.g., a pipelined ADC), which may form part of a multi-stage wireless communications base station receiver.

REFERENCES:
patent: 6114907 (2000-09-01), Sakurai
patent: 6956434 (2005-10-01), Gupta

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