King Billion Electronics Co., Ltd.

Industrial Technology Research Institute

Jih-Shin Ho

An amplifier circuit with a shared current source a first amplifier, a second amplifier and a current source. The output of the first amplifier () is coupled to the current source (). When the second amplifier () is cascaded onto the first amplifier (), the current source () is also connected to the second amplifier (), such that these two amplifiers can share a common drive current, so the power dissipated by these two amplifiers is greatly reduced. This technique is implemented with Class A amplifiers, Class B amplifiers, Class AB amplifiers or a combination of the above amplifiers in cascade.

Amplifier circuit with a shared current source

A temperature compensated technique and circuit can be realized through the generation of a temperature compensated output voltage (Vnew) provided after summing the temperature coefficients (TC1,TC2) of two base voltages (VTC1, VTC2) assigned with different weights (a, b) and producing a new temperature coefficient (TCnew). This TCnew satisfies the expression: TCnew=TC1+a&#xd7;(TC2&#x2212;TC1), where the assigned weighted value (a) can be either a positive or a negative value, depending on the requirement of a circuit, in order to develop voltage supply suitable for wider applications.

Temperature compensated voltage supply circuit

A power device termination structure is disclosed. The structure comprises a primary field plate electrically connect to a main junction, a secondary field plate electrically connect to a field ring which are apart from the main junction, and a floating field plate formed in between the primary field plate and secondary field plate. The primary field plate and secondary field plate are formed on an insulating layer, and the floating field plate is buried in the insulating layer. The endings of the floating field plate are in alignment with the ends of the extension portion of the primary field plate and the secondary field plate. The primary field plate, the secondary field plate and the floating conductive plate, are capacitively coupled each other so that the electrical field crowding problem is lesser.

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Kaohsiung, Taiwan

Jih-Shin Ho