Abstract:
A photovoltaic greenhouse includes a house structure having upstanding walls and a roof thereover to enclose a greenhouse space therein, and at least one thin-film solar cell module mounted on the roof for converting solar energy within a pre-selected light band of sunlight into electricity, wherein light not absorbed by the thin-film solar cell module passes through and enters the greenhouse space, which can be utilized by plants or crops for photosynthesis. The thin-film solar cell module has high transmittance of light in the wavelength intervals, for example, 400-450 nm and 640-700 nm, required by the cultured plants or crops inside the greenhouse space for photosynthesis.
Abstract:
A photovoltaic greenhouse includes a house structure having upstanding walls and a roof thereover to enclose a greenhouse space therein, and at least one thin-film solar cell module mounted on the roof for converting solar energy within a pre-selected light band of sunlight into electricity, wherein light not absorbed by the thin-film solar cell module passes through and enters the greenhouse space, which can be utilized by plants or crops for photosynthesis. The thin-film solar cell module has high transmittance of light in the wavelength intervals, for example, 400-450 nm and 640-700 nm, required by the cultured plants or crops inside the greenhouse space for photosynthesis.
Abstract:
A photovoltaic greenhouse includes a house structure having upstanding walls and a roof thereover to enclose a greenhouse space therein, and at least one thin-film solar cell module mounted on the roof for converting solar energy within a pre-selected light band of sunlight into electricity, wherein light not absorbed by the thin-film solar cell module passes through and enters the greenhouse space, which can be utilized by plants or crops for photosynthesis. The thin-film solar cell module has high transmittance of light in the wavelength intervals, for example, 400-450 nm and 640-700 nm, required by the cultured plants or crops inside the greenhouse space for photosynthesis.
Abstract:
A system and method for converting a digital signal to an analog signal is provided. The present disclosure provides a digital-to-analog converter (DAC) that can convert a large bit value digital signal to a corresponding analog signal. In accordance with an embodiment, a method comprises receiving portions of a digital signal by a plurality of sub-DACs; converting the portions of the digital signal to a corresponding analog signal by the plurality of sub-DACs; biasing one or more of the plurality of sub-DACs; and calibrating the portions of a digital signal by one or more calibration elements.
Abstract:
A ratio meter includes a converter circuit, a first counter, a delay circuit, and a second counter. The converter circuit is configured to receive a temperature-independent signal, to convert the received temperature-independent signal into a first frequency signal during a first phase, to receive a temperature-dependent signal, and to convert the temperature-dependent signal into a second frequency signal during a second phase. The first counter is configured to receive the first frequency signal and to generate a control signal by counting a predetermined number of pulses of the first frequency signal count. The delay circuit is configured to delay the control signal for a predetermined time delay. The second counter is configured to receive the second frequency signal and to generate a count value by counting the second frequency signal.
Abstract:
One or more techniques for buffer offset modulation or buffer offset cancelling are provided herein. In an embodiment, an output for a sigma-delta analog digital converter (ADC) is provided using an output of a first chop-able buffer (FB) and an output of a second chop-able buffer (SB). For example, the output of the FB is associated with a first offset, the output of the SB is associated with a second offset, and the output of the ADC includes an ADC offset associated with the first offset and the second offset. In an embodiment, buffer offset modulation is provided by modulating the ADC offset using an offset rotation. In an example, the offset rotation is based at least in part on a reference clock and the output of the ADC. The buffer offset modulation mitigates the first offset or the second offset, where such offsets are generally undesired.
Abstract:
An integrated circuit includes a high side driver and a low side driver. The low side driver is electrically coupled with the high side driver. A circuit is electrically coupled with the high side driver and a first node between the high side driver and the low side driver. The circuit is configured to substantially turn off the high side driver if the high side driver leaves a cutoff region of the high side driver during a tri-state mode.
Abstract:
A system for converting a digital signal to an analog signal is provided. The present invention provides a digital-to-analog converter (DAC) that can convert a large bit value digital signal to a corresponding analog signal. The digital-to-analog converter includes a bias regeneration circuit, and three sub-DACs. The bias regeneration circuit provides biasing to the three sub-DACs allowing the DAC to be implemented with smaller circuit area. In addition, the three sub-DACs may be digitally calibrated during the conversion process to increase the linearity of the DAC.
Abstract:
This invention discloses a digital to analog converter (DAC) for converting a digital signal with a predetermined number of bits to a corresponding analog signal, the DAC comprises a first current source element having a first control signal, the first control signal controlling the conduction current provided by the first current source element, and a second current source element having a second control signal, the second control signal controlling the conduction current provided by the second current source element, wherein the first and the second control signals have different voltages during operation of the DAC.
Abstract:
A system and method for converting a digital signal to an analog signal is provided. The present disclosure provides a digital-to-analog converter (DAC) that can convert a large bit value digital signal to a corresponding analog signal. In accordance with an embodiment, a method comprises receiving portions of a digital signal by a plurality of sub-DACs; converting the portions of the digital signal to a corresponding analog signal by the plurality of sub-DACs; biasing one or more of the plurality of sub-DACs; and calibrating the portions of a digital signal by one or more calibration elements.