公开(公告)号：US20080290938A1

公开(公告)日：2008-11-27

申请号：US12002592

申请日：2007-12-18

申请人： Deepnarayan Gupta ,  Alan Kadin

发明人： Deepnarayan Gupta ,  Alan Kadin

IPC分类号： H03G3/00

CPC分类号： H03G3/002 ,  H03F3/2178 ,  H03F3/24 ,  H03F2200/168 ,  H03F2200/351 ,  H03F2200/451 ,  H03G1/0088

摘要： A broadband multibit digital radio-frequency (RF) signal is synthesized digitally. to convert the digital signal to a high-power analog signal for RF transmission. Each bit (or cluster of bits) of the digital signal is first separately amplified using a fast switching amplifier with a controlled dc power supply voltage. The DC voltages are weighted to match the significance of the bits, and controlled by a set of calibrated DC reference sources to maintain high precision. The amplified digital signals from the various bits are then combined and passed through an appropriate analog filter to generate the RF signal to be transmitted. Such a signal can exhibit broad bandwidth, high dynamic range, excellent linearity, and low noise. Preferred embodiments of this system can incorporate superconducting electronic elements. For ultimate precision, a set of primary or secondary DC voltage standards can be used to regulate the switching amplifier supply voltages.

摘要翻译： 数字合成宽带多位数字射频（RF）信号。 将数字信号转换为高功率​​模拟信号进行RF传输。 使用具有受控直流电源电压的快速开关放大器，首先分别放大数字信号的每个位（或位串）。 直流电压被加权以匹配位的重要性，并由一组校准的直流参考源控制以保持高精度。 然后将来自各种位的放大的数字信号组合并通过适当的模拟滤波器以产生要发送的RF信号。 这样的信号可以呈现宽带宽，高动态范围，优异的线性度和低噪声。 该系统的优选实施例可以包含超导电子元件。 为了最终的精度，可以使用一组初级或次级直流电压标准来调节开关放大器电源电压。

公开(公告)号：US06781435B1

公开(公告)日：2004-08-24

申请号：US10356859

申请日：2003-02-03

申请人： Deepnarayan Gupta ,  Alan Kadin

发明人： Deepnarayan Gupta ,  Alan Kadin

IPC分类号： H03K1762

CPC分类号： H03M9/00 ,  H03K19/1954 ,  H03M1/12

摘要： A circuit for converting an n-bit number to a serial stream of single-bit pulses includes circuitry for generating n different sets of pulses; each set of pulses corresponding to a bit of the n-bit binary number; the number of pulses in a set of pulses corresponding to a bit “j” being equal to 2(j−1) pulses, where “j” is an integer which varies from one (1) for the LSB to n for the MSB. The circuit also includes n switches each switch having an input port, an output port and a control port. Each different bit is applied to the control port of a switch and the set of pulses corresponding to the bit is applied to the control port of that switch. The output ports of the n switches are coupled to a common point for combining the signals at the output ports and producing a serial stream of single-bit pulses at the common point which is equivalent to the n-bit binary number. A shift register capable of storing 2n−1 pulses may be connected to the common point and digital to analog circuitry may be connected to the output of the shift register for producing an analog voltage.

摘要翻译： 用于将n位数转换为单位脉冲的串行流的电路包括用于产生n组不同脉冲的电路; 每组脉冲对应于n位二进制数的位; 与比特“j”对应的一组脉冲中的脉冲数等于2 <（j-1）>个脉冲，其中“j”是从对于LSB的n（1）变为n的整数， MSB。 该电路还包括n个开关，每个开关具有输入端口，输出端口和控制端口。 每个不同的位被施加到开关的控制端口，并且对应于该位的脉冲组被施加到该开关的控制端口。 n个开关的输出端口耦合到用于组合输出端口处的信号的公共点，并在等于n位二进制数的公共点产生单位脉冲的串行流。 能够存储2n -1个脉冲的移位寄存器可以连接到公共点，并且数模转换电路可以连接到移位寄存器的输出端以产生模拟电压。

公开(公告)号：US07701286B2

公开(公告)日：2010-04-20

申请号：US12002592

申请日：2007-12-18

申请人： Deepnarayan Gupta ,  Alan Kadin

发明人： Deepnarayan Gupta ,  Alan Kadin

IPC分类号： H03G3/00

CPC分类号： H03G3/002 ,  H03F3/2178 ,  H03F3/24 ,  H03F2200/168 ,  H03F2200/351 ,  H03F2200/451 ,  H03G1/0088

摘要： A broadband multibit digital radio-frequency (RF) signal is synthesized digitally. to convert the digital signal to a high-power analog signal for RF transmission. Each bit (or cluster of bits) of the digital signal is first separately amplified using a fast switching amplifier with a controlled dc power supply voltage. The DC voltages are weighted to match the significance of the bits, and controlled by a set of calibrated DC reference sources to maintain high precision. The amplified digital signals from the various bits are then combined and passed through an appropriate analog filter to generate the RF signal to be transmitted. Such a signal can exhibit broad bandwidth, high dynamic range, excellent linearity, and low noise. Preferred embodiments of this system can incorporate superconducting electronic elements. For ultimate precision, a set of primary or secondary DC voltage standards can be used to regulate the switching amplifier supply voltages.

摘要翻译： 数字合成宽带多位数字射频（RF）信号。 将数字信号转换为高功率​​模拟信号进行RF传输。 使用具有受控直流电源电压的快速开关放大器，首先分别放大数字信号的每个位（或位串）。 直流电压被加权以匹配位的重要性，并由一组校准的直流参考源控制以保持高精度。 然后将来自各种位的放大的数字信号组合并通过适当的模拟滤波器以产生要发送的RF信号。 这样的信号可以呈现宽带宽，高动态范围，优异的线性度和低噪声。 该系统的优选实施例可以包含超导电子元件。 为了最终的精度，可以使用一组初级或次级直流电压标准来调节开关放大器电源电压。

公开(公告)号：US4702955A

公开(公告)日：1987-10-27

申请号：US822447

申请日：1986-01-27

申请人： David Allred ,  Alan Kadin ,  Purnachandra Pai

发明人： David Allred ,  Alan Kadin ,  Purnachandra Pai

IPC分类号： G02B5/28 ,  B32B7/02 ,  B32B17/06

CPC分类号： G02B5/285 ,  Y10T428/2495 ,  Y10T428/24975 ,  Y10T428/265

摘要： A coated article, for example an architectural transparency, including a vehicular transparency, or a reflecting article, as a decorative article. The article has a substrate, e.g., a substantially transparent or substantially opaque substrate. The substrate has an optical coating on it, that is a coating having a thin film of an oxide of a transition metal, the thin film having a thickness corresponding to a constructively interfering function of a wavelength of interest. The optical coating, having a thin film of a transition metal, enhances the reflectivity of some wavelengths of the visible portion of the electromagnetic spectrum and the reflectivity of other wavelengths of the visible portion of the electromagnetic spectrum.

摘要翻译： 作为装饰品的涂布制品，例如建筑透明度，包括车辆透明度或反射制品。 该制品具有基底，例如基本上透明或基本不透明的基底。 基板上有光学涂层，即具有过渡金属氧化物的薄膜的涂层，该薄膜的厚度对应于感兴趣波长的建构性干扰功能。 具有过渡金属薄膜的光学涂层增强了电磁光谱的可见部分的一些波长的反射率和电磁光谱的可见部分的其它波长的反射率。