Monolithic integrated circuit device including AC negative feedback type high frequency amplifier circuit
AssigneeNippon Telegraph & Telephone Public Corporation
InventorsYukio Akazawa, Noboru Ishihara, Mamoru Ohara
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Abstract
A monolithic integrated circuit device is formed on a substrate and made up of an AC negative feedback circuit for a high frequency amplifier circuit. The AC negative feedback circuit includes a semiconductor impedance element and connected to an external terminal on the substrate, and variable control means for adjusting an amount of the AC feedback of the high frequency amplifier circuit. As the semiconductor impedance element is used the junction capacitance of a diode under negative bias, diffusion capacitance between the base and emitter electrodes or between the base and collector electrodes of a transistor or a differentiated resistance of a diode.
Claims26
A monolithic integrated circuit device including an AC negative feedback type high frequency amplifier circuit comprising:
- a substrate on which said monolithic integrated circuit device is formed;
- and
- an AC negative feedback circuit for said high frequency amplifier circuit including a semiconductor impedance element having a junction capacitance of a diode supplied with a reverse bias voltage and connected to an external terminal on said substrate, which is connected to a variable control means for adjusting an amount of AC feedback of said high frequency amplifier circuit.
The monolithic integrated circuit device according to claim 5 which further comprises a resistor connected between a juncture between said diode and said capacitor and said external terminal.
A monolithic integrated circuit device including an AC negative feedback type high frequency amplifier circuit comprising:
- a substrate on which said monolithic integrated circuit device is formed;
- and
- an AC negative feedback circuit for said high frequency amplifier circuit including a semiconductor impedance element, wherein said element is a capacitance between a base region of the element and a region neighboring the base region and connected to an external terminal on said substrate, which is connected to a variable control means for adjusting an amount of AC feedback of said high frequency amplifier circuit.
A monolithic integrated circuit device including an AC negative feedback type high frequency amplifier circuit comprising:
- a substrate on which said monolithic integrated circuit device is formed;
- and
- an AC negative feedback circuit for said high frequency amplifier circuit including a semiconductor impedance element, wherein said element is a differentiated resistance of a diode, connected to an external terminal on said substrate, which is connected to a variable control means for adjusting an amount of AC feedback of said high frequency amplifier circuit.
Dependencies are inferred from the claim text.