Inventor
YAMAKIDO KAZUO
JP21 patents
⚠️ This page may combine multiple inventors who share the name “YAMAKIDO KAZUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
18 patentsUS5515047AMay 7, 1996
Converter, offset adjustor, and portable communication terminal unit
HITACHI LTD66 citations94
US4796296AJan 3, 1989
PCM coder and decoder having function of two-wire/four-wire conversion
HITACHI LTD26 citations92
US4672361AJun 9, 1987
Linear interpolative analog-to-digital converter
HITACHI LTD32 citations92
US5227795AJul 13, 1993
Over-sampling analog-to-digital converter using a current switching circuit as a local digital-to-analog converter
HITACHI LTD40 citations91
US5392456AFeb 21, 1995
Method of controlling filter time constant and filter circuit having the time constant control function based on the method
HITACHI LTD33 citations90
US4250492AFeb 10, 1981
Non-uniform weighting circuitry
HITACHI LTD14 citations74
US5406218AApr 11, 1995
Phase demodulator receiving inputs from phase detector and binary phase detector
HITACHI LTD8 citations73
US5157398AOct 20, 1992
A/D convertor of the pipeline type having additional comparators for use in setting a specified reference voltage
HITACHI LTD8 citations73
US4945359AJul 31, 1990
A/D converter
HITACHI LTD15 citations73
US4652858AMar 24, 1987
Interpolative D/A converter
HITACHI LTD15 citations73
US4369433AJan 18, 1983
Digital-to-analog converter and PCM encoder using the converter
HITACHI LTD11 citations73
US4366439ADec 28, 1982
PCM Decoder
HITACHI LTD7 citations73
US5347279ASep 13, 1994
Analog/digital converter of the over-sampling type with feedback correction to offset sampling error
HITACHI LTD17 citations72
US4787080ANov 22, 1988
PCM coder and decoder circuit having digital balancing network
HITACHI LTD13 citations71
US4507792AMar 26, 1985
PCM Encoder conformable to the A-law
HITACHI LTD11 citations68
US4603417AJul 29, 1986
PCM coder and decoder
HITACHI LTD4 citations62
US4338656AJul 6, 1982
Voltage polarity switching circuit
HITACHI LTD5 citations62
US4591827AMay 27, 1986
PCM coder-decoder
HITACHI LTD5 citations59