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1. 发明授权

US07308244B2 Low voltage mixer 有权
标题翻译：低压混频器
公开(公告)号：US07308244B2
公开(公告)日：2007-12-11
申请号：US11131339
申请日：2005-05-18
申请人： Simon Chang , Ian Michael Sabberton
发明人： Simon Chang , Ian Michael Sabberton
IPC分类号： H04B1/26
CPC分类号： H03D7/1441 , H03D7/1458 , H03D7/1491 , H03D2200/0084
摘要： A mixer comprising a pair of low frequency mixer inputs, a pair of high frequency mixer inputs, a pair of mixer outputs, four switching units, each switching unit comprising a low frequency switching unit input, a high frequency switching unit input, a switching unit output, a node connected via a high pass filter to the respective high frequency switching unit input and via a low pass filter to the respective low frequency switching unit input and a switching device arranged to provide an output at the respective switching unit output in dependence on the voltage at the respective node, and comprising a first feedback loop responsive to the voltage at the first low frequency mixer input and arranged to regulate the current through the outputs of the first and second ones of the switching units so that the total current through the outputs of the first and second ones of the switching units is substantially proportional to the voltage at the first low frequency mixer input and a second feedback loop responsive to the voltage at the second low frequency mixer input and arranged to regulate the current through the outputs of the third and fourth ones of the switching units so that the total current through the outputs of the third and fourth ones of the switching units is substantially proportional to the voltage at the second low frequency mixer input.
摘要翻译：一种混频器，包括一对低频混频器输入，一对高频混频器输入，一对混频器输出，四个开关单元，每个开关单元包括低频切换单元输入，高频切换单元输入，开关单元输出，通过高通滤波器连接到相应的高频切换单元输入的节点，并且经由低通滤波器连接到相应的低频切换单元输入;以及开关装置，被配置为根据相应的低频切换单元输出，在相应的开关单元输出端提供输出各个节点处的电压，并且包括响应于第一低频混频器输入处的电压的第一反馈环路，并且被布置成调节通过第一和第二开关单元的输出的电流，使得通过第一和第二开关单元的输出基本上与第一低频混频器输入端的电压成比例，第二低频混频器输入端的电压基本成比例响应于第二低频混频器输入处的电压的反馈回路，并被布置成调节通过第三和第四开关单元的输出的电流，使得通过第三和第四开关单元的输出的总电流基本上与第二低频混频器输入端的电压成比例。

2. 发明授权

US06968168B1 Variable oscillator 有权
标题翻译：可变振荡器
公开(公告)号：US06968168B1
公开(公告)日：2005-11-22
申请号：US09618296
申请日：2000-07-18
申请人： James Digby Yarlet Collier , Ian Michael Sabberton
发明人： James Digby Yarlet Collier , Ian Michael Sabberton
IPC分类号： H03B5/08 , H03B1/00 , H03B5/12 , H03L7/099 , H03L7/18 , H04B7/00
CPC分类号： H03L7/099 , H03B5/1203 , H03B5/1231 , H03B5/1243 , H03B2201/0266 , H03J2200/10
摘要： A variable frequency oscillator comprising: an oscillatory circuit for generating a periodic output dependent on the capacitance between a first node and a second node of the circuit, and having a capacitative element connected between the first node and the second node; the capacitative element comprising: a variable capacitance unit, the capacitance of which is variable for varying the frequency of the output and a plurality of finite capacitances each being selectively connectable in parallel with the variable capacitance unit between the first node and the second node to trim the frequency of the output.
摘要翻译：一种可变频率振荡器，包括：振荡电路，用于根据电路的第一节点和第二节点之间的电容产生周期性输出，并且具有连接在第一节点和第二节点之间的电容元件; 所述电容元件包括：可变电容单元，其电容可变以改变输出的频率;以及多个有限电容，每个有选择的电容可选地可与第一节点和第二节点之间的可变电容单元并联，以修整输出频率。

3. 发明授权

US07091756B2 Integrated circuit 有权
标题翻译：集成电路
公开(公告)号：US07091756B2
公开(公告)日：2006-08-15
申请号：US09541857
申请日：2000-04-03
申请人： James Digby Collier , Ian Michael Sabberton
发明人： James Digby Collier , Ian Michael Sabberton
IPC分类号： H03K23/00 , H03K25/00
CPC分类号： H03K23/542
摘要： A frequency divider circuit is provided having an even number of amplifier stages connected in series with the output of the last amplifier stage connected to the input of the first amplifier stage; and modulating means responsive to an input signal to be frequency divided, for modulating the propagation delay through each of the amplifier stages about the period of the input signal to be divided, such that when propagation through the odd amplifier stages increases, the propagation through the even amplifier stages decreases. The frequency divider circuit can be used as a pre-scaler of a radio receiver circuit.
摘要翻译：提供了一种分频器电路，其具有与连接到第一放大器级的输入的最后一个放大器级的输出串联的偶数个放大器级; 以及响应于待分频的输入信号的调制装置，用于调制通过每个放大器级的传播延迟，围绕待分割的输入信号的周期，使得当通过奇数放大器级的传播增加时，传播通过甚至放大器级减少。分频器电路可以用作无线电接收机电路的预分频器。

4. 发明授权

US06681102B1 Adjustable filter 有权
标题翻译：可调式过滤器
公开(公告)号：US06681102B1
公开(公告)日：2004-01-20
申请号：US09618637
申请日：2000-07-18
申请人： James Digby Yarlet Collier , Ian Michael Sabberton
发明人： James Digby Yarlet Collier , Ian Michael Sabberton
IPC分类号： H04B110
CPC分类号： H03J3/08 , H03B5/1265 , H03B2201/0266 , H03J2200/10
摘要： A radio transmitter and/or receiver comprising: an oscillator tuning circuit comprising an adjustable capacitor whose capacitance is adjustable by means of a first tuning signal; a filter tuning circuit comprising an adjustable capacitor whose capacitance is adjustable by means of a second tuning signal; an oscillator whose operational frequency is dependant on the reactance of the oscillator tuning circuit; a filter for filtering signals in the course of transmission and/or reception, and whose response is dependant on the reactance of the filter tuning circuit; and a tuning unit for generating the first and second tuning signals; wherein at least a part of the filter tuning circuit is a replica of at least a part of the oscillator tuning circuit and the tuning circuit is capable of generating one of the first and second tuning signals in dependence on the other of the tuning signals.
摘要翻译：一种无线电发射机和/或接收机，包括：振荡器调谐电路，包括可调电容器，其电容可通过第一调谐信号调节; 滤波器调谐电路，其包括可调电容器，其电容通过第二调谐信号可调; 振荡器的工作频率取决于振荡器调谐电路的电抗; 用于在发送和/或接收过程中对信号进行滤波，并且其响应取决于滤波器调谐电路的电抗的滤波器; 以及调谐单元，用于产生第一和第二调谐信号; 其中所述滤波器调谐电路的至少一部分是所述振荡器调谐电路的至少一部分的复制品，并且所述调谐电路能够根据所述调谐信号中的另一个产生所述第一和第二调谐信号中的一个。

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