Kazuharu Aoki

Transmitting/receiving unit having automatic gain control system with temperature compensation

Double-balanced modulator and quadri-phase shift keying device

Multistage variable gain amplifier circuit

AGC voltage correction circuit

Receiver integrated circuit for mobile telephone

High-frequency input circuit for two inputs

Active low-pass filter

Frequency synthesizer having shortened lock-up time

Gain control circuit capable of reducing change in gain due to variation of ambient temperature

Mutual inductance element, and balance/unbalance transducer