1
Shoichi Narahashi, Toshio Nojima, Makoto Maeta, Kazuaki Murota: Feed-forward amplifier. Nippon Telegraph and Telephone Corporation, Pollock Vande Sande and Priddy, November 24, 1992: US05166634 (51 worldwide citation)

In a feed-forward amplifier which has an error detection circuit for detecting a nonlinear distortion component of a main amplifier and an error rejection circuit for amplifying the detected distortion component by an auxiliary amplifier and injecting it into the main amplifier to cancel an error co ...


2
Isao Shimizu, Katsunori Miyatake, Shuji Urabe, Kazuaki Murota: Mobile communication apparatus. Nippon Telegraph and Telephone Corporation, Armstrong Nikaido Marmelstein & Kubovcik, March 28, 1989: US04817197 (29 worldwide citation)

Local frequency which is subject to fluctuate in a mobile subscriber set is locked to stable transmit frequency of a base station. A mobile subscriber set (FIG. 3) for angle modulated signal has a frequency mixer (3.6, 3.9), for converting wireless receive frequency to an intermediate frequency by u ...


3
Yoshiaki Tarusawa, Toshio Nojima, Kazuaki Murota: High precision phase comparator and phase locked loop. NTT Mobile Communications Network, Nippon Telegraph and Telephone Corporation, Pollock Vande Sande and Priddy, April 12, 1994: US05302908 (5 worldwide citation)

A modulus counter counts first clock pulses to modulus M and outputs the count value as an m-bit reference signal, M being an integer. A latch circuit samples and holds the reference signal in response to a trigger signal generated by a trigger signal generator in synchronism with an input signal. A ...


4
Kazuaki Murota: Voltage output circuit, integrated circuit and electronic device. Fujitsu Ten, Oliff & Berridge, November 15, 2011: US08058853 (2 worldwide citation)

A voltage output circuit has a controller controlling ON/OFF switching of a first switch which switches ON/OFF voltage transformation by a first charge pump circuit in order to turning a first voltage outputted from a first voltage output terminal into a desired value, a second charge pump circuit t ...


5
Kazuaki Murota: Overcurrent protection circuit and in-vehicle display device. Fujitsu Ten, Oliff & Berridge, February 19, 2013: US08379360

An overcurrent protection circuit is provided. An overcurrent detecting element is connected between a power source and a load and detects an overcurrent flowing through the load. A main switch element is connected between the load and the overcurrent detecting element and controls flow of current t ...


6
Kazuaki MUROTA: Overcurrent protection circuit and in-vehicle display device. Fujitsu Ten, March 31, 2011: US20110075307-A1

An overcurrent protection circuit is provided. An overcurrent detecting element is connected between a power source and a load and detects an overcurrent flowing through the load. A main switch element is connected between the load and the overcurrent detecting element and controls flow of current t ...


7
Kazuaki Murota: Voltage output circuit, integrated circuit and electronic device. Fujitsu Ten, Oliff & Berridge, February 25, 2010: US20100045251-A1

A voltage output circuit has a controller controlling ON/OFF switching of a first switch which switches ON/OFF voltage transformation by a first charge pump circuit in order to turning a first voltage outputted from a first voltage output terminal into a desired value, a second charge pump circuit t ...