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Class Information
Number: 332/101
Name: Modulators > Frequency shift keying modulator or minimum shift keying modulator > Including logic element (e.g., logic gate or flip-flop)
Description: Subject matter containing a component which performs a Boolean Algebraic operation.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7283012 |
Tri-state pulse density modulator |
Oct. 16, 2007 |
| 7065157 |
GMSK modulation techniques |
Jun. 20, 2006 |
| 6674812 |
High IF frequencies with a lower frequency logic based FSK modulation selecting a harmonic alias and demodulation using sub-sampling techniques |
Jan. 6, 2004 |
| 6452461 |
High-speed power-efficient coded M-ary FSK modulator |
Sep. 17, 2002 |
| 6392499 |
Frequency shift modulation circuit |
May. 21, 2002 |
| 6324603 |
Data transmission system and game system using the same |
Nov. 27, 2001 |
| 6317009 |
Frequency shift key modulating oscillator |
Nov. 13, 2001 |
| 6313772 |
Complex carrier signal generator for determining cyclic wave shape |
Nov. 6, 2001 |
| 6288618 |
Logic-based architecture for FSK modulation and demodulation |
Sep. 11, 2001 |
| 6265948 |
Image rejection in logic-based architecture for FSK modulation and demodulation |
Jul. 24, 2001 |
| 6225873 |
Frequency shift key modulating oscillator |
May. 1, 2001 |
| 6163229 |
Frequency generator for generating two independent FSK signals |
Dec. 19, 2000 |
| 6002304 |
Data modulation system using digital signal processing |
Dec. 14, 1999 |
| 5942955 |
Quasi-GMSK modulator |
Aug. 24, 1999 |
| 5926072 |
FM modulator using a monostable multivibrator |
Jul. 20, 1999 |
| 5889443 |
Frequency synthesizing circuit using a phase-locked loop |
Mar. 30, 1999 |
| 5838208 |
Modulation of transmission data signal in sychronous with transmission clock signal |
Nov. 17, 1998 |
| 5835539 |
FSK modulator |
Nov. 10, 1998 |
| 5789991 |
FSK modulating and demodulating apparatus wherein each binary data is represented by same number of cycles of modulated signal |
Aug. 4, 1998 |
| 5627499 |
Digital modulator and upconverter having single-bit delta-sigma data converters |
May. 6, 1997 |
| 5485129 |
Method and apparatus for digital modulation using pulse deletion |
Jan. 16, 1996 |
| 5444415 |
Modulation and demodulation of plural channels using analog and digital components |
Aug. 22, 1995 |
| 5436599 |
Method and apparatus for digital modulation using pulse addition |
Jul. 25, 1995 |
| 5399998 |
Digital FM modulator |
Mar. 21, 1995 |
| 5382924 |
Continuous phase frequency shift keying modulator |
Jan. 17, 1995 |
| 5365548 |
Digital FSK transmitter |
Nov. 15, 1994 |
| 5361046 |
Modulator having fractional sample/symbol time |
Nov. 1, 1994 |
| 5289141 |
Method and apparatus for digital modulation using concurrent pulse addition and subtraction |
Feb. 22, 1994 |
| 5227741 |
Variable speed asynchronous modem |
Jul. 13, 1993 |
| 5216391 |
MSK modulator having a digital quadrature reference waveform generator |
Jun. 1, 1993 |
| 5187721 |
Frequency shift keying modulator |
Feb. 16, 1993 |
| 5073903 |
Information transmission arrangement using frequency modulation |
Dec. 17, 1991 |
| 5020075 |
Direct sequence spread spectrum modulation apparatus |
May. 28, 1991 |
| 4924482 |
Data-transmitting apparatus |
May. 8, 1990 |
| 4878035 |
Hybrid frequency shift keying modulator and method |
Oct. 31, 1989 |
| 4757519 |
Digital premodulation filter |
Jul. 12, 1988 |
| 4748640 |
Digital circuit with band limiting characteristics for modem |
May. 31, 1988 |
| 4724534 |
Method and apparatus for transmitting binary data signals by frequency shift keying |
Feb. 9, 1988 |
| 4686688 |
Arrangement for generating an angle-modulated carrier signal of a constant amplitude in response to data signals |
Aug. 11, 1987 |
| 4686490 |
Digital data modulator and digital-to-analog converter |
Aug. 11, 1987 |
| 4672634 |
Arrangement for generating an angle-modulated carrier signal of constant amplitude in response to data signals |
Jun. 9, 1987 |
| 4656646 |
Serial minimum shift-keyed modem |
Apr. 7, 1987 |
| 4648099 |
Digital minimum shift keyed modulator |
Mar. 3, 1987 |
| 4625318 |
Frequency modulated message transmission |
Nov. 25, 1986 |
| 4584540 |
Digital direct modulator with type of modulation selection |
Apr. 22, 1986 |
| 4569060 |
FSK Coding method and apparatus involving multiples and submultiples of a given frequency |
Feb. 4, 1986 |
| 4543541 |
FSK modulation using switched outputs of two oscillators |
Sep. 24, 1985 |
| 4539533 |
Digital MSK modulator |
Sep. 3, 1985 |
| 4523158 |
Clock regenerator using two on-off oscillators |
Jun. 11, 1985 |
| 4500856 |
Simplified minimum shift keying modulator |
Feb. 19, 1985 |
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