Circuit trimming of packaged IC chip

A magnetically configurable adjuster device for trimming a circuit of a packaged integrated circuit (IC) chip to which the magnetically configurable adjuster device is coupled, the magnetically configurable adjuster device comprising:

• a Hall element, wherein the Hall element can sense a magnetic field that is applied onto the packaged IC chip to trim the circuit of the packaged IC chip, and generate a corresponding voltage signal;
• a signal processor and amplifier device that is connected to the Hall element, wherein the signal processor and amplifier device receives and amplifies the voltage signal from the Hall element;
• a decoder that is connected to the signal processor and amplifier device, wherein the decoder receives the voltage signal amplified by the signal processor and amplifier device and outputs a plurality of corresponding decoded signals;
• and
• a configurable adjuster that is connected to the decoder, wherein the configurable adjuster includes a plurality of circuit-trimming members and a plurality of electrically configurable elements which configurations can be modified by the decoded signals so as to accomplish a desired circuit trimming of the packaged IC chip via the circuit-trimming members.