P

Inventor

IGARASHI SADAO

JP26 patents
⚠️ This page may combine multiple inventors who share the name “IGARASHI SADAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ALPS ELECTRIC CO LTD

23 patents
US4725793AFeb 16, 1988

Waveguide-microstrip line converter

ALPS ELECTRIC CO LTD145 citations98
US6236848B1May 22, 2001

Receiver integrated circuit for mobile telephone

ALPS ELECTRIC CO LTD24 citations92
US5926749AJul 20, 1999

Amplifier circuit having common AGC to IF and RF amplifiers for use in a transmitter

ALPS ELECTRIC CO LTD31 citations92
US5900782AMay 4, 1999

AGC voltage correction circuit

ALPS ELECTRIC CO LTD35 citations92
US5900781AMay 4, 1999

Multistage variable gain amplifier circuit

ALPS ELECTRIC CO LTD30 citations92
US5418500AMay 23, 1995

High-frequency oscillator circuit

ALPS ELECTRIC CO LTD24 citations92
US5329189AJul 12, 1994

Mixer circuit

ALPS ELECTRIC CO LTD32 citations92
US4761624AAug 2, 1988

Microwave band-pass filter

ALPS ELECTRIC CO LTD46 citations92
US4725798AFeb 16, 1988

Waveguide filter

ALPS ELECTRIC CO LTD29 citations92
US4152669AMay 1, 1979

Phase locked loop with means for preventing locking at undesired frequencies

ALPS ELECTRIC CO LTD50 citations92
US4716387ADec 29, 1987

Waveguide-microstrip line converter

ALPS ELECTRIC CO LTD21 citations82
US4504796AMar 12, 1985

Microwave circuit apparatus

ALPS ELECTRIC CO LTD21 citations82
US5532650AJul 2, 1996

High-frequency amplifier

ALPS ELECTRIC CO LTD11 citations74
US4724408AFeb 9, 1988

Waveguide filter

ALPS ELECTRIC CO LTD7 citations74
US4701728AOct 20, 1987

Waveguide filter

ALPS ELECTRIC CO LTD12 citations74
US4306311ADec 15, 1981

Double-balanced mixer circuit

ALPS ELECTRIC CO LTD16 citations74
US5327097AJul 5, 1994

Gain control circuit

ALPS ELECTRIC CO LTD12 citations73
US5115317AMay 19, 1992

Tuning apparatus for a television receiver including selectively activated amplifier and local oscillator circuits

ALPS ELECTRIC CO LTD12 citations73
US5057788AOct 15, 1991

2-stage differential amplifier connected in cascade

ALPS ELECTRIC CO LTD18 citations73
US4799033AJan 17, 1989

Microwave separator

ALPS ELECTRIC CO LTD12 citations73
US4426627AJan 17, 1984

Phase-locked loop oscillator circuit utilizing a sub-loop with a second phase comparator

ALPS ELECTRIC CO LTD12 citations73
US4369414AJan 18, 1983

High-frequency input circuit for two inputs

ALPS ELECTRIC CO LTD16 citations73
US6351504B1Feb 26, 2002

Reception circuit

ALPS ELECTRIC CO LTD11 citations68

NEC ELECTRONICS CORP

1 patent

RF CHIPS TECHNOLOGY INC

1 patent

OMRON TATEISI ELECTRONICS CO

1 patent