|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||375/88 ; 375/80 ; 307/358 ; 329/300|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 25 인용 특허 : 1|
An FSK shift keying device includes a detector for detecting a transmission frame consisting of a preamble, data, and a postamble, a leading edge detector for detecting a leading edge of a voltage signal detected by the detector, a microprocessor for receiving a detection signal output from the leading edge detector as an interrupt signal, and resetting and restarting a timer, the timer for counting a time lapse in accordance with a clock signal from a clock generator, a sample and hold circuit for holding the voltage signal output from the detector when...
A frequency shift keying (FSK) demodulating device in a transmission system for formatting digital data into a transmission frame including at least a preamble to transmit the data as a frequency shift keying signal, comprising: detecting means for detecting the input frequency shift keying signal (FSK signal) to convert the detected signal into a voltage signal corresponding to each of carrier frequency values; and discriminating means coupled to said detecting means for discriminating the voltage signal output from said detecting means to an original d...