摘要:
A reception signal processing devices includes a converter which converts an analog signal amplified by an amplifying section to a digital signal, switches respectively provided in post-stages of variable gain amplifiers of the amplifying section, a bypass switch section which sets to open and close a path in which outputs of the variable gain amplifiers go around the variable gain amplifiers of the post-stages and are inputted to the converter, a switch controller which controls the switches and the bypass switch section and a DC offset controller which sets a correction value of a DC offset in accordance with a gain set to the variable gain amplifier as an object to be corrected.
摘要:
A reception signal processing devices includes a converter which converts an analog signal amplified by an amplifying section to a digital signal, switches respectively provided in post-stages of variable gain amplifiers of the amplifying section, a bypass switch section which sets to open and close a path in which outputs of the variable gain amplifiers go around the variable gain amplifiers of the post-stages and are inputted to the converter, a switch controller which controls the switches and the bypass switch section and a DC offset controller which sets a correction value of a DC offset in accordance with a gain set to the variable gain amplifier as an object to be corrected.
摘要:
An A/D conversion device has means for generating a control clock signal having a cycle that is an integral multiple of a cycle of a reference clock signal; means for generating a shift voltage which varies every cycle of the reference clock signal while the cycle of the control clock signal is taken as one cycle, means for offsetting an analog signal by the shift voltage, means for A/D converting the offset analog signal every cycle of the reference clock signal signal, and means for averaging outputs from the A/D converter every cycle of the control clock signal.
摘要:
An A/D conversion device generates a control clock signal having a cycle that is an integral multiple of a cycle of a reference clock signal. A shift voltage is generated which varies every cycle of the reference clock signal while the cycle of the control clock signal is taken as one cycle. An analog signal is offset by the shift voltage. The offset analog signal is converted to a digital signal every cycle of the reference clock signal. Outputs from the A/D converter are averaged every cycle of the control clock signal.
摘要:
A wireless communication method, a radio transmitter apparatus and a radio receiver apparatus wherein a signal sequence, which is used in a reception process using a first modulation scheme and can be generated from a signal sequence prepared for a reception process and used in a second modulation scheme, is employed, thereby achieving a performance to a similar extent to the reception process performance using the second modulation scheme. A radio transmitter apparatus (20) uses a first modulation scheme (e.g., OOK modulation scheme) to sequentially transmit, as a first sequence, both a sub-sequence a1(n), which is identical with a second sequence a(n) designed for use in a second modulation scheme (e.g., BPSK modulation scheme), and a sub-sequence a2(n), the bits of which are reverse to those of the second sequence a(n), in a time division manner. A radio receiver apparatus (30) detects the sub-sequence a1(n) and sub-sequence a2(n) in a received signal to send the detection result to the following stage for a signal processing.
摘要:
The carbon dioxide membrane separation system in a coal gasification process contains introduction of a mixed gas of hydrogen (H2) and carbon dioxide (CO2) in a high temperature and high pressure condition generated through water gas shift reaction from a water gas shift reaction furnace, while maintaining the temperature and pressure condition, to a zeolite membrane module containing a zeolite membrane for removing carbon dioxide, thereby removing carbon dioxide and generating a fuel gas rich in hydrogen. The fuel gas rich in hydrogen in a high temperature and high pressure condition discharged from the zeolite membrane module is fed to a gas turbine of the power generation facility while maintaining the temperature and pressure condition.
摘要:
A high-frequency module includes a high-frequency circuit chip, a wiring board having a wiring unit including connection pads which are flip-chip-connected to input and output terminals of the high-frequency circuit chip via bumps, a measurement circuit element that is disposed on a surface, opposed to the wiring board, of the high-frequency circuit chip and is connected between at least two terminals, connected to connection pads of the wiring unit, of the input and output terminals, or that is disposed on a surface, opposed to the high-frequency circuit chip, of the wiring board and is connected to the connection pads, and a detection conductor that is disposed on the high-frequency circuit chip or the wiring board at such a position as to be opposed to the measurement circuit element.
摘要:
A variable inductor includes a spiral inductor, a loop conductor, and a switch for opening or short-circuiting an end of the loop conductor. The loop conductor is formed in a direction perpendicular to the spiral inductor and is used for adjusting the inductance value of the spiral inductor by opening or short-circuiting the end of the loop conductor by the switch.
摘要:
A communication system includes a modulating circuit to increase the amount of information to be transmitted, a transmitting apparatus capable of easily generating a desired waveform even for any very short wavelets, a receiving apparatus capable of easily separating wavelets even if the intervals thereof are narrow. The modulating circuit includes clock generating, transmission signal generating, control signal generating, delay and wavelet generating parts. The clock generating part generates a clock signal at predetermined time interval “Tp”. The transmission signal generating part generates a transmission signal at interval “Tp”. The control signal generating part outputs a control signal of a predetermined duration based on the clock signal. The delay part generates the control signal as a delay signal that has been delayed by a delay amount based on the transmission signal. The wavelet generating part generates a wavelet at the generation timing of the delay signal.
摘要:
It is an object of the invention to provide a pulse generation circuit and a modulator for realizing a high On/Off ratio in a small circuit scale and with lower power consumption. A short pulse generation circuit according to the invention includes an oscillator 101, a control signal generation circuit 102, an intermittent frequency multiplier 103, a filter 104, and an output terminal 105. The oscillator 101 and the intermittent frequency multiplier 103 are active circuits implemented as active elements. A continuous signal is output from the oscillator 101 and is input to the intermittent frequency multiplier 103 and the intermittent frequency multiplier 103 intermittently operates according to a control signal output from the control signal generation circuit 102, thereby generating a short pulse signal, and a spurious component is removed through the filter.