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 patentsUS4725793AFeb 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