Trimmer device and related trimming method

A trimmer device for adjusting a reference signal of a target circuit, the trimmer device comprising:

• a switch controlling module comprising:
• a fuse, selectively melted according to an ideal value of the reference signal;
• and
• a control signal generating circuit, coupled to the fuse, for generating a control signal according to a conducting condition of the fuse;
• and
• an impedance adjusting circuit, coupled to the target circuit and the switch controlling module, the impedance adjusting circuit comprising:
• a switch module, selectively conductive according to the control signal;
• and
• an impedance network, coupled to the switch module, for determining an equivalent impedance of the impedance network according to a conducting condition of the switch module such that the reference signal is adjusted;
• wherein the switch module comprises N switch devices, the impedance network comprises N impedance devices, a first impedance device and at least an Nth impedance device of the N impedance devices are connected in series, a first switch device of the N switch devices is connected in parallel with the first impedance device, an Nth switch device of the N switch devices is connected in parallel with the serially connected first impedance device and at least the Nth impedance device, wherein N is an integer greater than 1.