LexDanaLexDanabeta
Inventor

Katsuji Kimura

Inventor
Tokyo, JP

Overview

113→
Patents
1985–2010
Patent span
Electricity
Primary field (CPC H)

Patents· 113 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G06Gprimary
G06GAnalogue computers27%
H03FAmplifiers22%
H03GControl of amplification14%
G05FSystems for regulating electric or magnetic variables10%
H03DDemodulation or transference of modulation from one carrier to another6%
H03HImpedance networks, e.g. resonant circuits4%
H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses3%
H03BGeneration of oscillations, directly or by frequency-changing, by circuits employing active elements which operate in a non-switching manner2%
H04NPictorial communication, e.g. television2%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests2%
PatentTitleYear
7,777,551'Multiplier circuit'20107,719,360'Variable gain circuit'20107,688,143'Variable gain circuit'20107,668,368'Image processing apparatus, camera apparatus, image output apparatus, image processing method, color correction processing program and computer readable recording medium'20107,622,967'Phase shifting circuit having a constant phase shift'20097,586,366'Complex filter circuit'20097,511,568'Reference voltage circuit'20097,471,141'Filter circuit'20087,459,963'Filter apparatus including differential slave gm-C filter with frequency characteristics automatically tuned by master circuit'20087,443,214'PLL circuit and frequency setting circuit using the same'20087,429,854'CMOS current mirror circuit and reference current/voltage circuit'20087,415,170'Data processing apparatus, image processing apparatus, camera, and data processing method'20087,372,243'Reference voltage circuit driven by non-linear current mirror circuit'20087,304,466'Voltage reference circuit compensated for non-linearity in temperature characteristic of diode'20077,180,364'Filter apparatus including slave gm-C filter with frequency characteristics automatically tuned by master circuit'20077,173,481'CMOS reference voltage circuit'20077,164,439'Flicker correction apparatus and flicker correction method, and recording medium storing flicker correction program'20077,126,425'Voltage control circuit for common mode voltage and method for controlling the same'20067,039,383'Quadrature mixer circuit including three-input local mixers'20066,900,689'CMOS reference voltage circuit'20056,867,650'Variable gain amplifier circuit'20056,850,109'Linear voltage subtractor/adder circuit and MOS differential amplifier circuit therefor'20056,683,497'MOS linear transconductance amplifier'20046,657,485'Linear voltage subtractor/adder circuit and MOS differential amplifier circuit therefor'20036,657,486'MOS differential amplifier circuit having a wide linear input voltage range'20036,617,923'Linear transconductance amplifier'20036,611,171'Linear transconductance amplifier'20036,605,998'Linear transconductance amplifier'20036,528,979'Reference current circuit and reference voltage circuit'20036,448,854'Linear transconductance amplifier'20026,111,463'Operational transconductance amplifier and multiplier'20006,107,858'OTA squarer and hyperbolic sine/cosine circuits using floating transistors'20006,031,409'Three-input multiplier and multiplier core circuit used therefor'20005,999,055'Tunable CMOS Operational Transconductance Amplifier'19995,990,727'Current reference circuit having both a PTAT subcircuit and an inverse PTAT subcircuit'19995,986,494'Analog multiplier using multitail cell'19995,982,200'Costas loop carrier recovery circuit using square-law circuits'19995,977,760'Bipolar operational transconductance amplifier and output circuit used therefor'19995,936,465'Bipolar OTA using multitail cell'19995,933,054'Bipolar operational transconductance amplifier'19995,925,094'Analog multiplier using triple-tail cell'19995,926,408'Bipolar multiplier with wide input voltage range using multitail cell'19995,912,834'Bipolar translinear four-quadrant analog multiplier'19995,912,580'Voltage reference circuit'19995,910,749'Current reference circuit with substantially no temperature dependence'19995,909,137'Voltage adder/subtractor circuit with two differential transistor pairs'19995,909,136'Quarter-square multiplier based on the dynamic bias current technique'19995,889,425'Analog multiplier using quadritail circuits'19995,886,560'Analog multiplier operable on a low supply voltage'19995,883,539'Differential circuit and multiplier'19995,872,483'Hyperbolic sine and cosine functional circuits, squaring circuit, and OTA consisting of two differential circuits with a dynamic bias current'19995,831,327'Differential circuit with a dynamic bias current for producing an exponential or a square-law transfer characteristic'19985,831,468'Multiplier core circuit using quadritail cell for low-voltage operation on a semiconductor integrated circuit device'19985,825,232'MOS four-quadrant multiplier including the voltage-controlled-three-transistor V-I converters'19985,815,039'Low-voltage bipolar OTA having a linearity in transconductance over a wide input voltage range'19985,796,243'Current multiplier/divider circuit'19985,774,020'Operational transconductance amplifier and multiplier'19985,774,010'MOS four-quadrant multiplier including the voltage-controlled-three-transistor V-I converters'19985,767,727'Trippler and quadrupler operable at a low power source voltage of three volts or less'19985,764,559'Bipolar multiplier having wider input voltage range'19985,754,076'Differential circuit having a variable current circuit for producing an exponential or a square transfer characteristic'19985,754,073'Analog multiplier'19985,748,041'AGC amplifier circuit using triple-tail cell'19985,712,810'Analog multiplier and multiplier core circuit used therefor'19985,712,594'Operational transconductance amplifier operable at low supply voltage'19985,668,750'Bipolar multiplier with wide input voltage range using multitail cell'19975,640,121'Quadrupler with two cross-coupled, emitter-coupled pairs of transistors'19975,631,594'Tunable logarithmic amplifier circuit using cascaded triple-tail cells'19975,627,461'Reference current circuit capable of preventing occurrence of a difference collector current which is caused by early voltage effect'19975,617,052'Transconductance-variable analog multiplier using triple-tail cells'19975,604,427'Current reference circuit using PTAT and inverse PTAT subcircuits'19975,602,509'MOS operational transconductance amplifier using an adaptively-biased differential pair'19975,583,456'Differentially coupled AND/NAND and XOR/XNOR circuitry'19965,581,210'Analog multiplier using an octotail cell or a quadritail cell'19965,581,211'Squaring circuit capable of widening a range of an input voltage'19965,578,965'Tunable operational transconductance amplifier and two-quadrant multiplier employing MOS transistors'19965,576,653'Analog multiplier operable on a low supply voltage'19965,561,392'Logarithmic amplifier employing cascaded full-wave rectifiers including emitter-coupled pairs with unbalanced emitter degeneration as logarithmic elements'19965,552,734'Local oscillator frequency multiplier and mixing circuit comprising a squaring circuit'19965,523,717'Operational transconductance amplifier and Bi-MOS multiplier'19965,521,542'Logarithmic amplifier circuit using triple-tail cells'19965,512,855'Constant-current circuit operating in saturation region'19965,506,537'Logarithmic amplifying circuit based on the bias-offset technique'19965,500,623'Differential amplifier circuit with almost linear transconductance'19965,485,119'MOS transconductance amplifier having squaring circuit for LSI implementation'19965,481,224'Differential amplifier circuit having a driver with square-law characteristic'19965,475,328'Logarithmic intermediate frequency amplifier circuit operable on low voltage'19955,471,166'Logarithmic amplifying circuit using quadritail cells'19955,467,046'Logarithmic intermediate-frequency amplifier'19955,444,648'Analog multiplier using quadritail circuits'19955,440,224'Reference voltage generating circuit formed of bipolar transistors'19955,438,296'Multiplier and squaring circuit to be used for the same'19955,432,432'Reference voltage generating circuit with temperature stability for use in CMOS integrated circuits'19955,396,659'Direct-coupled FET frequency multiplier and mixer circuit'19955,381,113'Differential amplifier circuit using quadritail circuit'19955,373,226'Constant voltage circuit formed of FETs and reference voltage generating circuit to be used therefor'19945,357,149'Temperature sensor circuit and constant-current circuit'19945,355,534'Frequency mixing circuit having automatic gain control function'19945,319,264'Logarithmic amplifying circuit'19945,319,267'Frequency doubling and mixing circuit'19945,315,261'Compressing and expanding operational circuit with no use of clock signal'19945,306,969'Frequency mixer circuit using FETs'19945,306,968'Rectifier circuit not using clock signal'19945,276,368'Frequency discriminator'19945,252,866'Frequency mixing circuit'19935,187,682'Four quadrant analog multiplier circuit of floating input type'19935,107,150'Analog multiplier'19925,057,717'Logarithmic amplifier circuit'19914,794,342'Intermediate frequency amplification circuit capable of detecting a field strength with low electric power'19884,709,404'Battery-powered radio communication apparatus capable of prolonging the communicable state thereof'19874,680,553'Intermediate frequency amplifier with signal strength detection circuit'19874,641,366'Portable radio communication apparatus comprising an antenna member for a broad-band signal'19874,541,122'Receiver including FET frequency mixer'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985Patents assigned to NIPPON ELECTRIC CO (1)· patent assignee history
1985–2007Based in Tokyo, JP· patent location history
1987–2005Patents assigned to NEC CORP (85)· patent assignee history
1987Patents assigned to GOTO NAOHISA (1)· patent assignee history
2003–2010Patents assigned to NEC ELECTRONICS CORP (24)· patent assignee history
2005–2010Based in Kanagawa, JP· patent location history
2007–2010Patents assigned to SHARP KK (3)· patent assignee history
2007Based in Yao, JP· patent location history
2008–2010Based in Osaka, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NEC CORP851987–2005
NEC ELECTRONICS CORP242003–2010
SHARP KK32007–2010
GOTO NAOHISA11987
NIPPON ELECTRIC CO11985
Locations
LocationPatentsSpan
Tokyo, JP941985–2007
Kanagawa, JP162005–2010
Osaka, JP22008–2010
Yao, JP12007