Temperature detector circuit and oscillation frequency compensation device using the same

A timing circuit, comprising:

• a device for providing an oscillating signal, having a frequency which is adjustable based on a first signal which is proportional to a detected temperature;
• a temperature detector configured to generate said first signal, said temperature detector comprising:
• a first transistor having a gate and a source connected to each other and a drain connected to a drain of a second transistor, and the source of the first transistor connected to a first power source, the first transistor being a depression type transistor;
• a third transistor having a gate and a drain connected to each other and a source connected to the first power source, and the drain connected to a drain of a fourth transistor, the third transistor being a depression type transistor with a same conductivity type and a different channel size relative to the first transistor;
• the second transistor having a gate and a drain connected to each other and a source connected to a second power source, the second transistor being a different conductivity type relative to the first transistor;
• and
• a fourth transistor having a gate connected to the gate of the second transistor, a source connected to the second power source, and configured to output said first signal from the drain, the fourth transistor being a different conductivity type relative to the first transistor.

A timing circuit comprising:

• a device configured to provide an oscillation signal having a frequency which is adjustable based on a first signal which is proportional to a detected temperature;
• a temperature detector circuit configured to generate said first signal;
• an amplification circuit configured to amplify said first signal;
• and
• an A/D converter configured to compare said amplified first signal of the amplification circuit with a reference voltage and to output temperature information as digital data based on said comparison;
• wherein the temperature detector circuit includes:
• a first transistor having a gate and a source connected to each other and a drain connected to a first power source, the first transistor being a depression type transistor, and a second transistor having a gate and a drain connected to each other and a source connected to a second power source, and connected in series to the first transistor between the first and second power source such that the source of the first transistor is connected to the drain of the second transistor at a connection point, and configured to output said first signal from the connection point, the second transistor being a depression type transistor with a same conductivity type and a different channel size relative to the first transistor.

A timing circuit, comprising:

• a device for providing an oscillation signal having a frequency which is adjustable based on a first signal having a voltage proportional to a detected temperature;
• a temperature detector configured to generate said first signal, said temperature detector comprising:
• a first transistor having a gate and a source connected to each other and a drain connected to a drain of a second transistor, and the source connected to a first power source, the first transistor being a depression type transistor;
• a third transistor having a gate and a drain connected to each other and a source connected to the first power source, and the drain connected to a drain of fourth transistor, the third transistor being a depression type transistor with a same conductivity type and a different channel size relative to the first transistor;
• a second transistor having a gate connected to a gate of a fifth transistor and a source connected to a second power source, the second transistor being a different conductivity type relative to the first transistor;
• a fifth transistor having a gate and a drain connected to each other and a source connected to the second power source, the fifth transistor being a different conductivity type relative to the first transistor;
• and
• a fourth transistor having a gate connected to the drain of the third transistor, a source connected to the drain of the fifth transistor, and configured to output said first signal from the drain, the fourth transistor being a different conductivity type relative to the first transistor.

A timing circuit, comprising:

• a device configured to correct an oscillation frequency thereof based on a first signal which is proportional to a detected temperature;
• a temperature detector configured to generate said first signal, said temperature detector comprising:
• a first transistor having a gate and a source connected to each other and a drain connected to a drain of a second transistor, and the source connected to a first power source, the first transistor being a depression type transistor;
• a third transistor having a gate and a drain connected to each other and a source connected to the first power source, and the drain connected to a drain of a fourth transistor, the third transistor being a depression type transistor with a same conductivity type and a different channel size relative to the first transistor;
• the second transistor having a gate and a drain connected to each other and a source connected to a drain of a fifth transistor, the second transistor being a different conductivity type relative to the first transistor;
• the fourth transistor having a gate connected to the gate of the second transistor, a source connected to a drain of a sixth transistor, and configured to output said first signal from the drain, the fourth transistor being a different conductivity type relative to the first transistor;
• the fifth transistor having a gate and a drain connected to each other and a source connected to a second power source, the fifth transistor being a different conductivity type relative to the first transistor;
• and
• the sixth transistor having a gate connected to the gate of the fifth transistor and a source connected to the second power source, the sixth transistor being a different conductivity type relative to the first transistor.

A timing circuit, comprising:

• a device configured to correct an oscillation frequency thereof based on a first signal which is proportional to a detected temperature;
• a temperature detector configured to generate said first signal, said temperature detector comprising:
• a first transistor having a gate and a source connected to each other and a drain connected to a drain of a second transistor and a gate of a third transistor, and the source connected to a first power source, the first transistor being a depression type transistor;
• a fourth transistor having a gate and a drain connected to each other and a source connected to the first power source, and the drain connected to a drain of a fifth transistor, the second transistor being a depression type transistor with a same conductivity type and a different channel size relative to the first transistor;
• the second transistor having a gate connected to a constant voltage power source and a source connected to a drain of the third transistor, the second transistor being a different conductivity type relative to the first transistor;
• the fifth transistor having a gate connected to the gate of the second transistor, a source connected to a drain of a sixth transistor, and configured to output said first signal from the drain, the fifth transistor being a different conductivity type relative to the first transistor;
• the third transistor having a source connected to a second power source, the third transistor being a different conductivity type relative to the first transistor;
• and
• the sixth transistor having a gate connected to the gate of the third transistor and a source connected to the second power source, the sixth transistor being a different conductivity type relative to the first transistor.