Adaptive biasing concept for current mode voltage regulators

Details Adaptive biasing concept for current mode voltage regulators Adaptive biasing concept for current mode voltage regulators

2007-01-23

2007-01-23

Sterrett, Jeffrey (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S316000

Reexamination Certificate

active

10948008

ABSTRACT:
Circuits and methods to achieve dynamic biasing for the complete loop transfer function of a current mode voltage regulator have been achieved. The circuit comprises a Mirror-Transconductor Amplifier type operational transconductance amplifier (OTA) wherein its transconductance is linearly dependent on its biasing current. This biasing current is a linearly derivative of the OTA's output current. A current amplification circuit couples the regulator output current linearly with said OTA's output current. In this configuration the iterative biasing of the OTA forms a feed-forward loop, which contains a low-pass filter for stability and a negative feedback loop is closed by connecting the regulator voltage output to the OTA input. The invention realizes a purely current mode regulator since all internal currents are generated as a fraction of the output load.

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