Dual path operational amplifier

摘要

An operational amplifier has two paths, a high frequency path and a low frequency path. In addition, it has three main sections of stages. A stage converts input voltage to an amplified output voltage, a stage converting an input voltage in to an output current and a final stage where the outputs of the two previous sections are supplied as inputs. Among them, the final stage acts as a voltage follower to a signal applied to its plus (+) input and as a transimpedance amplifier for a signal applied to its minus input (−). In this configuration, a path for low frequencies and a path for high frequencies are created in a single operational amplifier.

主权项

1. A dual path operational amplifier, comprising
a path for low frequency; a path for high frequency; said high frequency being higher than said low frequency; said dual path operational amplifier being defined into three sections, a first section, a second section and a third section; said first section converting a first input voltage to a first amplified output voltage; said third section comprising a third amplifier; said third amplifier comprising a plus port and a minus port; said first amplified output voltage being a third A input to said plus port of said third amplifier; and a second voltage corresponding to said second section being a third B input to said minus port of said third amplifier.