Resistor trimming device and electronic device

An electronic device, comprising:

• a first resistor;
• a second resistor;
• and
• a resistor trimming device, comprising:
• a decoder, configured to receive a binary code or an original thermometer code, and generating a trimming thermometer code and a group code based on the binary code or the original thermometer code;
• and
• a resistor trimming module, electrically connected to the decoder, and comprising M adjustable resistor string groups serially connected to each other,
• wherein
• M is a number of groups, and M is an integer which is greater than 2, wherein each of the resistor string groups comprises a main switch, (N−1) switches, and N resistors with the same resistance as each other,
• wherein
• a first end of the main switch is electrically connected to a first end of the first resistor in the N resistors, and a second end of the main switch is electrically connected to a second end of the Nth resistor of the N resistors,
• wherein a first end of the i-th switch of the (N−1) switches is electrically connected to a second end of the i-th resistance of the N resistors, and second end of the i-th switch of the (N−1) switches is electrically connected to a N-th resistor of the N resistors,
• wherein N is a number of resistors of each the M adjustable resistor string groups, N is an integer which is greater than 2, and i is an integer between 1 and N, and
• wherein the main switch and every switches in each the M adjustable resistor string groups are controlled based on the trimming thermometer code and the group code.