| Patent Number |
Title Of Patent |
Date Issued |
| 7443261 |
Phase modulating apparatus, communication device, mobile wireless unit, and phase modulating met |
October 28, 2008 |
| A multimode-based phase modulating apparatus capable of reducing the degradation of modulation precision and suppressing the unnecessary power consumption. This apparatus has a switch for switching the modulation modes of a PLL circuit between a single-point modulation and a double-p |
| 7378918 |
Two-point modulation type phase modulation apparatus, polar modulation transmission apparatus, w |
May 27, 2008 |
| There provides a two-point modulation phase modulation apparatus capable of obtaining an RF phase modulation signal of superior modulation precision with low power consumption and a simple configuration even in the event of inputting a wide band baseband modulation signal. A differen |
| 7333789 |
Wide-band modulation PLL, timing error correction system of wide-band modulation PLL, modulation |
February 19, 2008 |
| A broadband modulation PLL includes a PLL portion containing a voltage controlled oscillator (101), a frequency divider (105), a phase comparator (104) and a loop filter (103). A frequency-dividing ratio of the frequency divider (105) is controlled to apply modulation, and also an in |
| 7333582 |
Two-point frequency modulation apparatus, wireless transmitting apparatus, and wireless receivin |
February 19, 2008 |
| A two-point frequency modulation apparatus is provided that reduces input timing difference and improves modulation accuracy. Two-point frequency modulation apparatus 10 has: PLL circuit 11; frequency division ratio generator 13 that generates the frequency division ratio in frequency |
| 7276985 |
Transmission modulation apparatus, communication apparatus and mobile wireless apparatus |
October 2, 2007 |
| Provided is a transmission modulation apparatus, using polar modulation of two-point modulation scheme, capable of completing a timing adjustment of a BB phase modulation signal and BB amplitude modulation signal in a short time. A phase modulation section (10) that performs two-point |
| 7236063 |
Broadband modulation PLL, and modulation factor adjustment method thereof |
June 26, 2007 |
| A problem of the present invention is to provide a wide band modulation PLL having good modulation accuracy at low cost. With respect to a PLL having a VCO (21), a frequency divider (22), a phase comparator (23), a charge pump (24) and a loop filter (25), the VCO (21) and a frequency |
| 7224237 |
Modulator and correction method thereof |
May 29, 2007 |
| The invention concerns a wideband modulator using a PLL synthesizer, which can match the frequency characteristic and prevent degradation in modulation accuracy even in the presence of a variation in the manufacture of circuit components. In a wideband modulator which modulates the d |
| 7215215 |
Phase modulation apparatus, polar modulation transmission apparatus, wireless transmission appar |
May 8, 2007 |
| A phase modulation apparatus is provided whereby excellent RF phase modulation signals can be obtained even when the modulation sensitivity of a voltage controlled oscillator varies. Phase modulation apparatus 100 has: phase detector 105 that performs phase detection with respect to an |
| 7199677 |
Frequency modulation apparatus |
April 3, 2007 |
| A frequency modulation apparatus 100 has a synthesizer 101, a differentiator 102 that differentiates phase modulation data and generates differential phase modulation data, an adder 103 that adds together that differential phase modulation data and carrier frequency data fractional p |
| 7157985 |
PLL modulation circuit and polar modulation apparatus |
January 2, 2007 |
| First and second calibration signals (308, 309) are sent to a frequency divider (102) and an adder (116) of a PLL section (100A), demodulated in a demodulator (111), filtered through a low pass filter (113) and a high pass filter (114) and thereafter sent to a modulation signal control |
| 7110486 |
Frequency synthesizer apparatus equipped with fraction part control circuit, communication appar |
September 19, 2006 |
| A fraction part control circuit of a frequency synthesizer apparatus including a PLL circuit is of a plural-n-th-order delta-sigma modulator circuit for controlling a fraction part of a number of frequency division to a variable frequency divider of the PLL circuit. An adder adds data of |
| 7050525 |
Frequency synthesizer apparatus equipped with fraction part control circuit, communication appar |
May 23, 2006 |
| A fraction part control circuit of a frequency synthesizer apparatus including a PLL circuit is of a plural-n-th-order delta-sigma modulator circuit for controlling a fraction part of a number of frequency division to a variable frequency divider of the PLL circuit. An adder adds data of |
| 6871055 |
Direct conversion receiver, mobile radio equipment using the same, and RF signal receiving metho |
March 22, 2005 |
| In a direction conversion receiver, a quadrature demodulator produces differential signals in a baseband on the basis of a local signal of a frequency synthesizer, with the differential signals being inputted through a first low pass filter, a gain control amplifier and an amplifier |
| 6728526 |
Fractional-N frequency synthesizer with multiple clocks having different timings |
April 27, 2004 |
| A frequency synthesizer device comprising a PLL circuit (9) and a frequency-division ratio control circuit (5). The PLL circuit (9) includes a phase comparator (1), a low-pass filter (2), a voltage-controlled oscillator (3), and a variable frequency divider (4). The frequency-divisio |
| 6717998 |
Frequency synthesizer apparatus equipped with fraction part control circuit, communication appar |
April 6, 2004 |
| A fraction part control circuit of a frequency synthesizer apparatus including a PLL circuit is of a plural-n-th-order delta-sigma modulator circuit for controlling a fraction part of a number of frequency division to a variable frequency divider of the PLL circuit. An adder adds data of |
| 6572941 |
Glare-resistant touch panel |
June 3, 2003 |
| A touch panel is constructed of a top sheet member having a resistive membrane on its inner surface and a base sheet member having a resistive membrane on its inner surface, the top and base sheet members facing each other with dot spacers being located in between. The top sheet member i |
| 6570707 |
Touch panel with high operability in low temperature environments |
May 27, 2003 |
| A touch panel is constructed of a top sheet member having a resistive membrane on its inner surface and a base sheet member having a resistive membrane on its inner surface, the top and base sheet members facing each other with dot spacers being located in between. The top sheet member i |
| 6566964 |
Frequency synthesizer and oscillation frequency control method |
May 20, 2003 |
| Accumulator 201 accumulates data K (K: integer) for every clock and outputs a carry-out signal at the time of an overflow. Random signal generator 202 outputs a random signal for every clock. Adder 203 adds the carry-out signal and random signal to data M (M: integer), changes the freque |
| 6563387 |
Method and apparatus for synthesizing high-frequency signals for wireless communications |
May 13, 2003 |
| A frequency synthesizer is provided with a prescaler 2 and a counter 3, which output a signal having a frequency generated by frequency-dividing an output signal of a VCO 1; a reference frequency divider 5 for frequency-dividing a frequency of a reference signal of a reference signal |
| 6559834 |
Glare-resistant touch panel |
May 6, 2003 |
| A touch panel is constructed of a top sheet member having a resistive membrane on its inner surface and a base sheet member having a resistive membrane on its inner surface, the top and base sheet members facing each other with dot spacers being located in between. The top sheet member i |
| 6441692 |
PLL frequency synthesizer |
August 27, 2002 |
| The invention provides a high-speed PLL frequency synthesizer in which the frequency of a reference signal can be made larger than a frequency interval of an external output with a simple configuration. An n-th harmonic of an output of a voltage-controlled oscillator is caused to pass |
| 6226499 |
Radio circuit apparatus and radio communication equipment |
May 1, 2001 |
| When the radio circuit apparatus is transmitting, the output signal of the first local oscillator 102 is inputted to the transmitted frequency converter 112 as well as to the frequency divider 104, and then the output signal of the frequency divider 104 is inputted to the modulator 111. |
