Patent ID: 9698853
Date: 2017-07-04
CPC Classifications: H03F,H04B

Claim:
1. An open loop current clamp to restrict the current draw of a first transistor, the open loop current clamp comprising: a current trim module including a voltage source having a voltage output terminal to provide a reference voltage, an adjustable resistive load and a control value generator configured to provide a control value as a function of the reference voltage and a voltage drop across the adjustable resistive load; and a limiting first current source having respective input and output terminals, the input terminal coupled to the current trim module to receive the control value, and the output terminal coupled to a first control terminal of the first transistor to provide a limiting electrical level produced in response to the control value, such that the limiting electrical level substantially sets a first mode of operation for the first transistor such that the current draw of the first transistor is substantially determined by the first mode of operation and the limiting electrical level such that a voltage at a first output terminal of the first transistor exerts reduced influence on the current draw.