Kabushiki Kaisha Toshiba

Tokyo Shibaura Denki Kabushiki Kaisha

Shigekazu Hori

Hideki Torizuka

Tomohide Soejima

Shigeru Watanabe

Hiroshi Kobayashi

Tamio Saito

Naotaka Tomita

An FET oscillator wherein a bias circuit is connected to a drain of a field-effect transistor and a source circuit including a transmission line and a self-bias circuit is connected to a source of the transistor, so that the source is substantially open-circuited at an oscillation frequency and the field-effect transistor operates as a two-terminal (the gate and drain) element exhibiting a negative resistance, and wherein a resonant circuit is connected to the gate of the transistor. With the source circuit connected to the transistor source, the oscillator can have a high unloaded Q-value of Qo and a high externally-loaded Q-value of Q.sub.ext, whereby the oscillation frequency is stable. According to this oscillator, only a single bias circuit for the drain is required without the need of a bias circuit for the gate.

FET oscillator exhibiting negative resistance due to high impedance at

The credit card includes an IC module having a data processing function, an insulation body for holding the IC module, and a plurality of terminals which are formed on the insulation body. The plurality of terminals are first and second contact pads to which a drive power and a data signal are supplied. The IC module is formed between the first and second contact pads.

Card with an IC module

In a microwave mixer circuit, two diodes connected in series are formed in a semi-insulating semiconductor substrate. A power distributing circuit is connected across the series circuit of the diodes. One of the connecting points is connected to a first signal terminal. A line connecting the two diodes in series is connected to the second signal input terminal and through a low-pass filter element to an intermediate frequency output terminal.

Microwave mixer circuit

FET Oscillator exhibiting negative resistance due to high impedance at

Growing community of inventors

Yokohama, Japan

Shigekazu Hori