Inventor
MIYAGI HIROSHI
JP45 patents
⚠️ This page may combine multiple inventors who share the name “MIYAGI HIROSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIIGATA SEIMITSU CO LTD
28 patentsUS7286804B2Oct 23, 2007
Receiver digital-analog converter and tuning circuit
NIIGATA SEIMITSU CO LTD15 citations82
US6930552B2Aug 16, 2005
FET band amplifier
NIIGATA SEIMITSU CO LTD6 citations74
US7403140B2Jul 22, 2008
Receiver, digital-analog converter and tuning circuit
NIIGATA SEIMITSU CO LTD7 citations71
US7576578B2Aug 18, 2009
Frequency synthesizer and charge pump circuit used for the same
NIIGATA SEIMITSU CO LTD3 citations63
US7561863B2Jul 14, 2009
Automatic gain control device
NIIGATA SEIMITSU CO LTD5 citations63
US7551906B2Jun 23, 2009
AM/FM radio receiver and local oscillator circuit used therein
NIIGATA SEIMITSU CO LTD3 citations63
US7368981B2May 6, 2008
Limit circuit
NIIGATA SEIMITSU CO LTD6 citations63
US7212794B2May 1, 2007
Receiver with a crystal oscillator having a natural-oscillation frequency set so that a fundamental component and its harmonics are outside the range of a receiving band of a modulated wave signal
NIIGATA SEIMITSU CO LTD2 citations63
US7120407B2Oct 10, 2006
Receiver and its tracking adjusting method
NIIGATA SEIMITSU CO LTD6 citations63
US7055072B2May 30, 2006
Memory system
NIIGATA SEIMITSU CO LTD3 citations63
US7049895B2May 23, 2006
FET band amplifier
NIIGATA SEIMITSU CO LTD3 citations63
US7046086B2May 16, 2006
FET band amplifier
NIIGATA SEIMITSU CO LTD2 citations63
US7038548B2May 2, 2006
Amplifier circuit for AM broadcasting
NIIGATA SEIMITSU CO LTD2 citations63
US6920321B1Jul 19, 2005
Measuring method for communication device
NIIGATA SEIMITSU CO LTD3 citations63
US6919710B2Jul 19, 2005
Smoothing circuit
NIIGATA SEIMITSU CO LTD3 citations63
US6906589B2Jun 14, 2005
Multistaged amplification circuit
NIIGATA SEIMITSU CO LTD4 citations63
US6844780B1Jan 18, 2005
Automatic gain control circuit
NIIGATA SEIMITSU CO LTD3 citations63
US6774720B2Aug 10, 2004
Electric field intensity detecting circuit and limiter amplifier
NIIGATA SEIMITSU CO LTD4 citations63
US6744307B2Jun 1, 2004
Filter circuit
NIIGATA SEIMITSU CO LTD5 citations63
US7269399B2Sep 11, 2007
Receiver of double conversion system with antenna tuning with variable capacitance using digital-to-analog converter having temperature coefficient setting section
NIIGATA SEIMITSU CO LTD2 citations61
US7579888B2Aug 25, 2009
Frequency synthesizer and charge pump circuit used therein
NIIGATA SEIMITSU CO LTD0 citations52
US7378709B2May 27, 2008
Oscillator with a guard ring formed around an N well and constituent components integrally formed on the N well, on a semiconductor substrate
NIIGATA SEIMITSU CO LTD0 citations52
US7133653B2Nov 7, 2006
Receiver and composite component having local oscillator components and mixing circuit integrally formed on semiconductor substrate
NIIGATA SEIMITSU CO LTD0 citations52
US6989720B2Jan 24, 2006
Receiver
NIIGATA SEIMITSU CO LTD0 citations52
US6858946B2Feb 22, 2005
Semiconductor device
NIIGATA SEIMITSU CO LTD0 citations52
US6753736B2Jun 22, 2004
Amplifier circuit for AM broadcasting
NIIGATA SEIMITSU CO LTD1 citations52
US7496419B2Feb 24, 2009
Modulation output device
NIIGATA SEIMITSU CO LTD0 citations42
US7130597B2Oct 31, 2006
Receiver having high-frequency amplifier circuit portions integrally formed on a semiconductor substrate
NIIGATA SEIMITSU CO LTD0 citations42
RICOH CO LTD
4 patentsUSRE42334EMay 10, 2011
Smoothing circuit employing charging circuit intermittently charging when input voltage is higher relatively than terminal voltage and discharging circuit intermittently releasing discharging current when terminal voltage is higher relatively than input voltage
RICOH CO LTD5 citations74
US7920835B2Apr 5, 2011
FM transmitter
RICOH CO LTD5 citations63
US7944321B2May 17, 2011
Harmonic suppressing circuit
RICOH CO LTD0 citations52
US7876169B2Jan 25, 2011
Modulating circuit
RICOH CO LTD0 citations42