Low-power consumption broadband high-gain high-swing rate single-level operation transconductance amplifier
A transconductance amplifier, high-gain technology, applied in differential amplifiers, DC-coupled DC amplifiers, etc., can solve the problems of difficult to meet the high-speed response requirements of dynamic current, gain reduction, difficult to high gain, etc., to ensure high-speed and linear processing performance , Solve the inherent limitation constraints, improve the effect of transient response speed
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[0016] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:
[0017] The present invention adopts following technical scheme:
[0018] An operational transconductance amplifier circuit with high precision and high speed response under the constraint of low power consumption (see Figure 4 ), its features include that the operational transconductance amplifier belongs to the OTA single-stage gain circuit structure; the circuit system is composed of three parts: constant current bias, differential input stage, load current mirror transmission output stage, and the PMOS differential pair tube adopts fixed tail current bias , two pairs of symmetrical load current mirrors respectively adopt a linear-nonlinear mode dynamic configurable structure composed of three NMOS transistors, and at the same time add a pair of cross-coupled tube-to-load current mirror equivalent input W / L modulation control structure; The output stage of the...
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