Samsung Electro-mechanics Co., Ltd.

Chang Soo Yang

Kwang Du Lee

Sang Yub Lee

Wan Cheol Yang

Chang Seok Lee

Yu Sin Kim

Sang Gyu Park

Jeong Ho Moon

Moo Il Jeong

Kyu Hwan An

Seung Heon Han

Hak Sun Kim

Min Kyoung Kwon

No Chul Myung

Hyung Cheol Park

Man Suk Seo

Hyung Chul Park

Kyuong Ree Kim

Seong Soo Lee

A parallel sequence spread spectrum type chaotic signal transmission device is disclosed to convert a serial data signal into a parallel data signal and transmit a chaotic signal according to the converted data signal. The parallel sequence spread spectrum type chaotic signal transmission device includes: a signal converting unit that converts serial data desired to be transmitted into parallel data having a pre-set unit; a chaotic signal generating unit that generates a pre-set chaotic signal; and an amplifying unit that amplifies the chaotic signal from the chaotic signal generating unit according to the data which has been converted by the signal converting unit.

Parallel sequence spread spectrum type chaotic signal transmission device

Provided is a method for compensating performance degradation of a radio frequency integrated circuit (RFIC) using an EM simulation. The method includes the steps of: (a) extracting the design specifications of the RFIC so as design and simulate a circuit; (b) designing the layout of the designed and simulated circuit, and extracting layout parameters by using the designed layout; (c) simplifying the layout and carrying out the EM simulation to extract performance parameters; (d) carrying out a circuit simulation by using the extracted layout parameters and performance parameters, and judging whether the results of the circuit simulation satisfy the design specifications of the RFIC or not; (e) when it is judged that the results of the circuit simulation satisfy the design specifications of the RFIC, performing a circuit manufacturing process; and (f) when it is not judged that the results of the circuit simulation satisfy the design specifications of the RFIC, partially removing the layout, and carrying out the EM simulation, thereby analyzing and compensating a performance degradation region.

Method for compensating performance degradation of RFIC using EM simulation

Provided is a device for generating a chaotic signal comprising a PN signal generator that is composed of a digital logic circuit and generates a digital pseudo random signal with a predetermined frequency; a voltage control that generates a clock signal with a predetermined frequency; a mixer that mixes the pseudo random signal and the clock signal so as to generate a chaotic signal to output; and a band-pass filter that filters the chaotic signal, output from the mixer, into a chaotic signal of a desired band and then outputs the filtered signal.

Device and method for generating chaotic signal

There is provided a distance measuring apparatus having system flexibility by varying a distance measuring range and a distance measuring resolution according to an environment and circumstance. The apparatus includes a reference pulse generator and a delay pulse generator capable of controlling frequencies of a reference pulse and a delay pulse and duty ratios of the reference pulse and the delay pulse. The reference pulse generator and the delay pulse generator include a programmable clock generation unit generating a clock of a frequency determined by a frequency control signal and a duty ratio control unit controlling a duty ratio of the clock generated by the programmable clock generation unit.

Distance measuring apparatus capable of controlling range and resolution

A ranging apparatus includes a reference pulse generator generating a reference pulse having a first frequency at a first point in time of transmitting a ranging signal from a first device; a delay pulse generator generating a delay pulse signal having a second frequency at a second point in time of receiving the a response signal transmitted from the second device in response to the ranging signal; an overlap detector detecting a third point in time that the reference and delay pulses overlap each other; a counter counting one of the reference and delay pulses until the third point; and a distance calculator calculating an amount of time from the first point to the second point by applying the first and second frequencies, and a count value of the counter and calculating the distance between the first device and the second device by using the amount of time.

Apparatus and method for estimating distance using time of arrival

Provided is a digital modulation circuit constructed with only a digital circuit. The digital modulation circuit includes: a clock generator which generates a reference clock pulse having a predetermined period; an up/down counter which generates a count value having predetermined bits by up-counting or down-counting the reference clock pulse and outputs a bit in the count value as a transmission signal; a controller which determines a counting start/end time point of the up/down counter and determine which one of the up-counting operation and the down-counting operation of the up/down counter is to be performed, according to a value of digital transmission data that is to be transmitted; and a band-pass filter which converts a waveform of the transmission signal output from the up/down counter into a sine waveform.

Digital modulation circuit

There is provided a device and method for detecting an overlap of pulse signals, capable of easily detecting a point where reference and delayed pulse signals overlap each other, and an apparatus for estimating a distance using the same. The device for detecting an overlap of pulse signals, the device detecting a point where first and second pulse signals having different frequencies begin to overlap each other, the device including: a duty adjustor generating a third pulse signal by increasing a duty of the second pulse signal; a pulse signal calculator multiplying the first and second pulse signals by the third pulse signal, respectively and adding respective results together to output a signal; and an overlap determiner determining a middle of a pulse with a greatest width in the signal outputted from the pulse signal calculator as a point where the first and second pulse signals overlap each other.

Device and method for detecting overlap of pulse signals and apparatus for estimating distance using the same

In a DC offset cancellation circuit, an operational amplifier is provided with an inverse terminal, a non-inverse terminal and an output terminal. A first resistor is connected to the non-inverse terminal. A second resistor connected between the inverse terminal and the output terminal. A DC offset cancellation resistor is connected between the inverse terminal and the non-inverse terminal. Also, in each of first and second DC offset cancellation circuits of the programmable gain amplifier, an operational amplifier is provided with an inverse terminal, a non-inverse terminal and an output terminal. A first resistor is connected to the non-inverse terminal. A second resistor is connected between the inverse terminal and the output terminal. A DC offset cancellation circuit is connected between the inverse terminal and the non-inverse terminal. Here, the first and second DC offset cancellation circuits are connected with each other in series.

DC offset cancellation circuit and programmable gain amplifier using the same

In a chaotic signal generator, a first signal generator generates a first signal. The first signal includes a first fundamental wave having a preset first frequency and a plurality of harmonic waves of the first fundamental wave. A second signal generator generates a second signal. The second signal includes a second fundamental wave having a preset second frequency and a plurality of harmonic waves of the second fundamental wave. Also, a mixer mixes the first signal from the first signal generator with the second signal from the second signal generator to generate a chaotic signal having a sum frequency of the first and second signals and the harmonic waves of the first and second signals. A filter passes a signal of a preset band out of the chaotic signal from the mixer.

Chaotic signal generator for ultra wide band communication system

A current mode logic (CML)-CMOS converter comprises an input stage that is turned on/off by receiving an input voltage from the outside; a voltage control unit that outputs a constant voltage; a first switching unit that is connected to the input stage and the voltage control unit and is turned on/off by the constant voltage applied from the voltage control unit; and a second switching unit that is connected to the input stage and is turned on/off by a signal applied from the input stage.

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Gyunggi-do, South Korea

Chang Soo Yang