Patent ID: 11876490
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 6:
7. An integrated circuit for temperature gradient compensation of a bandgap voltage, the integrated circuit comprising:
a bandgap reference circuit having a bandgap adjustment input and a bandgap reference output;
a first transistor at a first location and having first and second current terminals and a first control terminal, and the second current terminal is coupled to a ground terminal through a first resistor;
a second transistor at a second location and having third and fourth current terminals and a second control terminal, the second control terminal is coupled to the first control terminal, and the fourth current terminal is coupled to the ground terminal through a second resistor;
a third transistor at the second location and having fifth and sixth current terminals and a third control terminal, the sixth current terminal is coupled to the ground terminal through a third resistor;
a fourth transistor at the first location and having seventh and eighth current terminals and a fourth control terminal, the fourth control terminal is coupled to the third control terminal, and the fourth current terminal is coupled to the ground terminal through a fourth resistor;
a fifth transistor coupled between the bandgap reference output and the first control terminal, and having a fifth control terminal coupled to the first current terminal;
a sixth transistor having ninth and tenth current terminals and a sixth control terminal, the sixth control terminal is coupled to the fifth control terminal, and the tenth current terminal is coupled to the third current terminal;
a seventh transistor coupled between the bandgap reference output and the third control terminal, and having a seventh control terminal coupled to the fifth current terminal;
an eighth transistor having eleventh and twelfth current terminals and an eighth control terminal, the eighth control terminal is coupled to the seventh control terminal, and the twelfth current terminal is coupled to the seventh current terminal; and
an amplifier having an amplifier input and an amplifier output, the amplifier input coupled to the eleventh current terminal, and the amplifier output configured to provide a signal proportional to a temperature difference between the first location and the second location.