Patent attributes
A temperature compensating circuit including a reference circuit, a transistor and a first circuit is provided. The reference circuit has a reference current and a resistance circuit, wherein the resistance circuit includes a first terminal receiving the reference current, a second terminal and a negative-temperature-coefficient resistor. The transistor has a drain, a source and a path disposed between the drain and the source, wherein the path of the transistor is connected in series with the resistance circuit, a gate of the transistor is electrically connected to the drain of the transistor and the second terminal of the resistance circuit, and the drain of the transistor produces a bias-voltage signal. The first circuit produces an output signal having a variable frequency in response to the bias-voltage signal, wherein the temperature compensating circuit utilizes the negative-temperature-coefficient resistor to compensate the variable frequency for a temperature change in the temperature compensating circuit.
