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    • 102. 发明授权
    • Photochromic compounds
    • 光致变色化合物
    • US07582749B2
    • 2009-09-01
    • US11925044
    • 2007-10-26
    • Anil KumarMeng HeTerry A. Kellar, IIForrest R. Blackburn
    • Anil KumarMeng HeTerry A. Kellar, IIForrest R. Blackburn
    • C07D405/14C07D315/00C07D405/02
    • C07D405/14C07D311/94C07D405/10C07D498/10C09B57/00C09K19/60G02B5/23G02B5/3016G02B5/3025G02F1/1335G03C1/73
    • Various non-limiting embodiments disclosed herein relate generally to photochromic compounds, which may be thermally reversible or non-thermally reversible, and articles made therefrom. Other non-limiting embodiments relate to photochromic-dichroic compounds, which may be thermally reversible or non-thermally reversible, and articles made therefrom. For example, one non-limiting embodiment provides a thermally reversible, photochromic compound adapted to have at least a first state and a second state, wherein the thermally reversible, photochromic compound has an average absorption ratio greater than 2.3 in at least one state as determined according to CELL METHOD. Another non-limiting embodiment provides a photochromic compound comprising: (a) at least one photochromic group chosen from a pyran, an oxazine, and a fulgide; and (b) at least one lengthening agent L attached to the at least one photochromic group and represented by the formula—[S1]c-[Q1 —[S2]d]d′-[Q2 —[S3]e]e′-[Q3 —[S4]f]f′—S5—P, which is described herein.
    • 本文公开的各种非限制性实施方案通常涉及光致变色化合物,其可以是热可逆的或不可逆的,以及由其制成的制品。 其它非限制性实施方案涉及光致变色二色性化合物,其可以是热可逆的或不可逆的,以及由其制备的制品。 例如,一个非限制性实施方案提供了适于具有至少第一状态和第二状态的热可逆的光致变色化合物,其中所述热可逆的光致变色化合物在至少一种状态中的平均吸收比大于2.3,如所确定的 根据细胞方法 另一个非限制性实施方案提供了一种光致变色化合物,其包含:(a)至少一种选自吡喃,恶嗪和吡啶的光致变色基团; 由式 - [S1] c- [Q1- [S2] d] d' - [Q2- [S3] e] e'表示的至少一个延长剂L连接到至少一个光致变色基团上, - [Q3 - [S4] f] f'-S5-P,这里描述。
    • 109. 发明申请
    • Method and system for controlling carrier leakage in a direct conversion wireless device
    • 在直接转换无线设备中控制载波泄漏的方法和系统
    • US20050245217A1
    • 2005-11-03
    • US10837119
    • 2004-04-30
    • Francesco DantoniAnil Kumar
    • Francesco DantoniAnil Kumar
    • H04B7/005H04B17/00H04B17/02
    • H04W52/52H04B17/354H04W52/346
    • According to one embodiment of the invention, a system for controlling carrier leakage in a communications device is provided. The system includes a first mixer unit operable to receive a first signal, to convert the first signal into a second signal having a higher frequency than the first signal, and to transmit the second signal. The system also includes a second mixer unit. The second mixer unit is operable to receive the second signal, to convert the second signal into an in-phase signal and a quadrature signal each having lower frequency than the second signal, and to transmit the in-phase signal and the quadrature signal. The system also includes a processor coupled to the first mixer and the second mixer. The processor is operable to perform a leakage reduction procedure by receiving the in-phase signal and the quadrature signal from the second mixer, sampling the in-phase signal and the quadrature signal, determining that a result from the sampling is not equal to a predetermined value, initiating a transmission of a direct current offset signal to the first mixer unit, and adjusting a voltage of the direct current offset signal until a next result of the sampling approximately equals the predetermined value.
    • 根据本发明的一个实施例,提供一种用于控制通信设备中的载波泄漏的系统。 该系统包括第一混合器单元,其可操作以接收第一信号,将第一信号转换成具有比第一信号更高的频率的第二信号,并发送第二信号。 该系统还包括第二混合器单元。 第二混频器单元可操作以接收第二信号,将第二信号转换成具有比第二信号低的频率的同相信号和正交信号,并发送同相信号和正交信号。 该系统还包括耦合到第一混频器和第二混频器的处理器。 处理器可操作以通过从第二混频器接收同相信号和正交信号来执行泄漏减少过程,对同相信号和正交信号进行采样,确定采样结果不等于预定的 开始向第一混频器单元发送直流偏移信号,以及调整直流偏移信号的电压,直到下一个采样结果近似等于预定值。