Oscillation circuit of cascode connection type
AssigneeKabushiki Kaisha Toshiba
InventorToru Kozu
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Abstract
An oscillation circuit comprises first and second transistors and a load. The first transistor includes a base inputted an oscillation signal, an emitter connected to a ground potential, and a collector. The second transistor includes a collector connected to a power supply potential, a gate and an emitter. The load has one end connected to the collector of the first transistor, and the other end connected to the emitter of the second transistor, and causes a voltage drop proportional to the power supply potential. The voltage drop caused by the load reduces dependency of a base-collector voltage of the first transistor upon the power supply potential.
Claims10
An oscillation circuit comprising:
- a first transistor including a base inputted an oscillation signal, an emitter connected to a ground potential, and a collector;
- a second transistor including a collector connected to a power supply potential, a base and an emitter;
- and
- first resistance element having one end connected to the collector of the first transistor, and another end connected to the emitter of the second transistor, the first resistance element causing a voltage drop proportional to the power supply potential,
- wherein a resistance of the first resistance element is set such that a change in a potential appearing across the first resistance element is equal to a change in a potential difference between the bases of the first and second transistors when the power supply potential changes.
Dependencies are inferred from the claim text.