摘要:
The camera module comprises: an insulating substrate 13 having an imaging device 18 on a front face thereof and a plurality of solder balls 21 on a rear face thereof; a cylindrical lens holder 14 securely fixed on the substrate 13, composed of an upper large-diameter portion 14-1 and a lower small-diameter portion 14-2 and having a lens 15 therein; a cylindrical shield 12 fitted onto the small-diameter portion 14-2 of the lens holder and composed of a cylindrical side portion 12-2 fixed on the large-diameter portion 14-1 of the lens holder and a plate-shaped bottom portion 12-1 in contact with the rear face of the insulating substrate 13 and having an opening 12-1a for conduction; and a mounting board 11 connected with the insulating substrate 13 by the plurality of solder balls 21 formed on the rear face of the insulating substrate 13.
摘要:
A camera module in which a shield having a lens holder therein can be fixed with high accuracy is provided. The camera module comprises: an insulating substrate 13 having an imaging device 18 on a front face thereof and a plurality of solder balls 21 on a rear face thereof; a cylindrical lens holder 14 securely fixed on the substrate 13, composed of an upper large-diameter portion 14-1 and a lower small-diameter portion 14-2 and having a lens 15 therein; a cylindrical shield 12 fitted onto the small-diameter portion 14-2 of the lens holder and composed of a cylindrical side portion 12-2 fixed on the large-diameter portion 14-1 of the lens holder and a plate-shaped bottom portion 12-1 in contact with the rear face of the insulating substrate 13 and having an opening 12-1a for conduction; and a mounting board 11 connected with the insulating substrate 13 by the plurality of solder balls 21 formed on the rear face of the insulating substrate 13.
摘要:
According to one embodiment, a camera module includes an insulating substrate having an imaging device, solder balls, a cylindrical lens holder, a shield, and a mounting board. The solder balls are formed on a rear face of the substrate. The lens holder is fixed on the substrate and includes an upper larger-diameter portion and a lower smaller-diameter portion. The shield includes a cylindrical side portion fitted onto the small-diameter portion and fixed on the rear face of the large-diameter portion and a plate-shaped bottom portion in contact with the rear face of the substrate and having an opening. The mounting board is on an upper surface of which the plate-shaped bottom portion is mounted to come in contact with the upper surface and the insulating substrate or the imaging device is connected with the upper surface by the plurality of solder balls.
摘要:
According to one embodiment, a camera module includes an insulating substrate 13 having an imaging device 18, solder balls 21, a cylindrical lens holder 14, a shield 12, and a mounting board 11. The solder balls 21 are formed on a rear face of the substrate 13. The lens holder 14 is fixed on the substrate 13 and is composed of an upper large-diameter portion 14-1 and a lower small-diameter portion 14-2. The shield 12 is composed of a cylindrical side portion 12-2 fitted onto the small-diameter portion 14-2 and fixed on the rear face of the large-diameter portion 14-1 and a plate-shaped bottom portion 12-1 in contact with the rear face of the substrate 13 and having an opening. The mounting board 11 is on an upper surface of which the plate-shaped bottom portion 12-1 is so mounted as to come in contact with the upper surface and the insulating substrate 13 or the imaging device 18 is connected with the upper surface by the plurality of solder balls 21.
摘要:
To adequately perform sampling, a receiving device that solves problems that involve an increase in circuit area and an increase in cost, is provided.A/D converter 2 samples a coherent signal that is an analog signal in synchronization with a sampling clock signal so as to convert the analog signal into a digital signal. DSP 3 demodulates the digital signal converted by A/D converter 2 and computes a phase of the sampling clock signal in which an error rate of the digital signal is the minimum based on the demodulated digital signal. Sampling clock extraction circuit 4 extracts a clock signal having a symbol rate of the coherent signal therefrom. Phase adjustment circuit 5 adjusts the phase of the clock signal extracted by sampling clock extraction circuit 4 to the phase computed by DSP 3 and generates a clock signal having the adjusted phase as the sampling clock signal.
摘要翻译:为了充分执行采样,提供了解决涉及电路面积增加和成本增加的问题的接收装置。 A / D转换器2与采样时钟信号同步地采样模拟信号的相干信号,以将模拟信号转换为数字信号。 DSP 3解调由A / D转换器2转换的数字信号,并且基于解调的数字信号计算数字信号的错误率为最小的采样时钟信号的相位。 采样时钟提取电路4从其中提取具有相干信号的符号速率的时钟信号。 相位调整电路5将由采样时钟提取电路4提取的时钟信号的相位调整为由DSP3计算的相位,并生成具有调整后的相位的时钟信号作为采样时钟信号。
摘要:
Capacitors (5a, 5b) are provided in the insulators of bushings (4a, 4b), respectively. One ends of the capacitors (5a, 5b) are connected to central conductors (3a, 3b) side, and the other ends are connected to a tank (1) side at the ground potential. When a discharge signal from the outside of the tank (1) reaches the capacitors (5a, 5b) through the central conductors (3a, 3b), the capacitors (5a, 5b) work as a filter to attenuate and prevent the signal in the frequency band of the discharge waveform from propagating to the inside of the tank (1). When an antenna (7) placed in the tank (1) receives a signal in the frequency band of the discharge waveform, a discharge detection unit (20) determines that a discharge inside the tank has been detected.
摘要:
An objective is to provide a digital receiver and a method of compensating waveform that are capable of compensating waveform distortion without increasing the circuit size. A digital receiver 100 according to the present invention includes distortion compensation filters 103 that compensate waveform distortion included in an input signal, skew compensation amount setting units 106 for setting a skew compensation amount used for compensating phase distortion among the waveform distortion, amplitude compensation amount setting units 107 for setting an amplitude compensation amount used for compensating amplitude of the input signal that attenuates upon the compensation of the phase distortion using the skew compensation amount, and filter coefficient calculation circuits 108 for determining a filter coefficient to be set to the distortion compensation filters 103 based on the skew compensation amount and the amplitude compensation amount.
摘要:
The disclosed coherent optical receiver includes a local light source; a 90-degree hybrid circuit; an optoelectronic converter; an analog-to-digital converter; a skew addition unit; and a FFT operation unit. The 90-degree hybrid circuit makes multiplexed signal light interfere with local light from the local light source, and outputs multiple optical signals separated into a plurality of signal components. The optoelectronic converter detects the optical signal and outputs a detected electrical signal. The analog-to-digital converter digitizes the detected electrical signal and outputs a detected digital signal. The skew addition unit adds to the detected digital signal an additional skew amount whose absolute value is equal to, whose sign is opposite to a skew amount of a difference in propagation delay in each lane connected to each output channel of the 90-degree hybrid circuit. The FFT operation unit performs a fast Fourier transform on the output from the skew addition unit.
摘要:
In a coherent optical receiver, sufficient demodulation becomes impossible and consequently receiving performance deteriorates if an interchannel skew arises, therefore, a coherent optical receiver according to an exemplary aspect of the invention includes a local light source; a 90-degree hybrid circuit; an optoelectronic converter; an analog-to-digital converter; and a digital signal processing unit, wherein the 90-degree hybrid circuit makes multiplexed signal light interfere with local light from the local light source, and outputs a plurality of optical signals separated into a plurality of signal components; the optoelectronic converter detects the optical signals and outputs detected electrical signals; the analog-to-digital converter quantizes the detected electrical signals and outputs quantized signals; and the digital signal processing unit includes a skew compensation unit for compensating a difference in propagation delay between the plurality of signal components, and a demodulation unit for demodulating the quantized signals.
摘要:
In a coherent optical receiver, sufficient demodulation becomes impossible and consequently receiving performance deteriorates if an inter-channel skew arises, therefore, a coherent optical receiver according to an exemplary aspect of the invention includes a local light source, a 90° hybrid circuit, an optoelectronic converter, an analog to digital converter, and a digital signal processing unit; wherein the 90° hybrid circuit makes multiplexed signal light interfere with local light from the local light source, and outputs a plurality of optical signals separated into a plurality of signal components; the optoelectronic converter detects the optical signals and outputs detected electrical signals; the analog to digital converter quantizes the detected electrical signals and outputs quantized signals; the digital signal processing unit includes a skew compensation unit for compensating a difference in propagation delay between the plurality of signal components, and an FFT operation unit for performing a fast Fourier transform process on the quantized signals; and wherein the difference in propagation delay is calculated on the basis of a plurality of peak values with a central focus on one peak value in the results of performing the fast Fourier transform process.