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Inventor:
Kimura; Yasuyuki
Address:
Maebashi, JP
No. of patents:
17
Patents:












Patent Number Title Of Patent Date Issued
8055218 Wireless transmitter circuit and transceiver using the same November 8, 2011
This invention provides a wireless transmitter circuit for mobile communication apparatus and this circuit can be configured with fewer components and is suitable for downsizing. A single PLL synthesizer serves as both RF frequency band PLL and IF frequency band PLL among three oscil
7689191 Semiconductor integrated circuit having built-in PLL circuit March 30, 2010
A semiconductor integrated circuit having a built-in PLL circuit which has two charge pump circuits for charging and discharging capacitive elements of a loop filter in response to signals generated by a phase comparator circuit. One of the two charge pump circuits has current sources wh
7499689 Communication semiconductor integrated circuit device and a wireless communication system March 3, 2009
In a communication semiconductor integrated circuit device using offset PLL architectures and including an oscillator circuit and a frequency divider circuit generating an intermediate frequency signal, the oscillator circuit includes an oscillator, a programmable frequency divider w
7499688 Communication semiconductor integrated circuit device and a wireless communication system March 3, 2009
In a communication semiconductor integrated circuit device using offset PLL architectures and including an oscillator circuit and a frequency divider circuit generating an intermediate frequency signal, the oscillator circuit includes an oscillator, a programmable frequency divider w
7450921 Communication semiconductor integrated circuit device for use in a mobile communication device f November 11, 2008
The invention provides a communication semiconductor integrated circuit (RF IC) that, when a transmission oscillator is incorporated into a semiconductor chip, secures the oscillation operation over a wide frequency range, prevents a deterioration of a transmission spectrum, and ther
7433653 Transmitter and semiconductor integrated circuit for communication October 7, 2008
A transmitter adopting a polar loop system including a phase control loop for controlling the phase of a carrier signal outputted from a transmitting oscillator and an amplitude control loop for controlling the amplitude of a transmitting output signal outputted from a power amplific
7269402 PLL circuit having a multi-band oscillator and compensating oscillation frequency September 11, 2007
A semiconductor integrated circuit device for communication is provided with a PLL circuit or the like formed therein, the PLL circuit which is capable of realizing the compensation of fluctuation due to temperature change, the inhibition of increase in the chip area and the ensurement o
7263340 PLL circuit having a multi-band oscillator and compensating oscillation frequency August 28, 2007
A semiconductor integrated circuit device for communication is provided with a PLL circuit or the like formed therein, the PLL circuit which is capable of realizing the compensation of fluctuation due to temperature change, the inhibition of increase in the chip area and the ensurement o
7248842 Wireless communication apparatus having a phase control loop shared by first and second modulati July 24, 2007
A transmitter adopting a polar loop system including a phase control loop for controlling the phase of a carrier signal outputted from a transmitting oscillator and an amplitude control loop for controlling the amplitude of a transmitting output signal outputted from a power amplific
7212047 Semiconductor integrated circuit having built-in PLL circuit May 1, 2007
A semiconductor integrated circuit having a built-in PLL circuit which has two charge pump circuits for charging and discharging capacitive elements of a loop filter in response to signals generated by a phase comparator circuit. One of the two charge pump circuits has current sources wh
7205850 Communication semiconductor integrated circuit device and a wireless communication system April 17, 2007
In a communication semiconductor integrated circuit device using offset PLL architectures and including an oscillator circuit and a frequency divider circuit generating an intermediate frequency signal, the oscillator circuit includes an oscillator, a programmable frequency divider w
7187911 Calibrated PLL for wide band communication semiconductor integrated polar loop transmitter March 6, 2007
The invention provides a communication semiconductor integrated circuit (RF IC) that, when a transmission oscillator is incorporated into a semiconductor chip, secures the oscillation operation over a wide frequency range, prevents a deterioration of a transmission spectrum, and ther
7103337 PLL circuit having a multi-band oscillator and compensating oscillation frequency September 5, 2006
A semiconductor integrated circuit device for communication is provided with a PLL circuit or the like formed therein, the PLL circuit which is capable of realizing the compensation of fluctuation due to temperature change, the inhibition of increase in the chip area and the ensurement o
7085544 Transmitter having a phase control loop whose frequency bandwidth is varied in accordance with m August 1, 2006
A transmitter adopting a polar loop system including a phase control loop for controlling the phase of a carrier signal outputted from a transmitting oscillator and an amplitude control loop for controlling the amplitude of a transmitting output signal outputted from a power amplific
7015735 Semiconductor integrated circuit having built-in PLL circuit March 21, 2006
A semiconductor integrated circuit having a built-in PLL circuit which has two charge pump circuits for charging and discharging capacitive elements of a loop filter in response to signals generated by a phase comparator circuit. One of the two charge pump circuits has current sources wh
6906596 Oscillation circuit and a communication semiconductor integrated circuit June 14, 2005
A voltage controlled LC resonance oscillation circuit has a plurality of capacitive elements connected to an output node. These capacitive elements are applied with voltages at opposing terminals for selecting an oscillating frequency band, so that the oscillating frequency band can be
6265916 Clock multiplier circuit capable of generating a high frequency clock signal from a low frequenc July 24, 2001
A clock multiplier circuit comprises: a counter for counting the number of pulses of a predetermined output clock signal; an expected value generating circuit for generating an expected value for the number of pulses of the predetermined output clock signal per a first period which i










 
 
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