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公开(公告)号：US07145410B2
公开(公告)日：2006-12-05
申请号：US10823052
申请日：2004-04-13
申请人： Nir Corse , Shay Nir , Mark Rozental
发明人： Nir Corse , Shay Nir , Mark Rozental
CPC分类号： H03B5/1231 , H03B5/1203 , H03B5/1243
摘要： A wireless communication unit (100) comprises a voltage controlled oscillator (123) having an active device (450) operably coupled to a first variable capacitance (425) to provide a variable capacitance value based on an applied steering line voltage, and a feedback network comprising a resonator (475), operably coupled to an output of the active device, for feeding power back to an input of the active device to sustain oscillations (123). Notably, a second variable capacitance is operably coupled to receive a control voltage from the steering line (405) and located between the resonator (475) and the active device (450).
摘要翻译： 无线通信单元（100）包括压控振荡器（123），其具有可操作地耦合到第一可变电容（425）的有源器件（450），以基于所施加的转向线电压提供可变电容值，以及反馈网络 包括可操作地耦合到有源器件的输出的谐振器（475），用于将功率回馈到有源器件的输入以维持振荡（123）。 值得注意的是，第二可变电容可操作地耦合以从转向线（405）接收并位于谐振器（475）和有源器件（450）之间的控制电压。
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2.发明授权Oscillator with tunable diffusion capacitance as resonant circuit capacitance 有权具有可调扩散电容的振荡器作为谐振电路电容公开(公告)号：US07209010B2
公开(公告)日：2007-04-24
申请号：US11094534
申请日：2005-03-31
申请人： Hans-Peter Waible
发明人： Hans-Peter Waible
CPC分类号： H03B5/1228 , H03B5/1209 , H03B5/1231 , H03B5/1243
摘要： An oscillator includes a resonant circuit of at least one inductance device and at least one tunable capacitance. The tunable capacitance is implemented through diffusion capacitances of at least one current-carrying transistor. The tunable capacitance has a first differential amplifier having a first transistor and a second transistor and a second differential amplifier having a third transistor and a fourth transistor Electrical properties of the first transistor and second transistor are complementary to electrical properties of the third transistor and fourth transistor, and control connections of the first transistor and the third transistor are connected to one another. Control connections of the second transistor and the fourth transistor are connected to one another. Second current connections of the first transistor and the third transistor are connected to one another, and second current connections of the second transistor and the fourth transistor are connected to one another.
摘要翻译： 振荡器包括至少一个电感器件的谐振电路和至少一个可调谐电容。 可调电容通过至少一个载流晶体管的扩散电容来实现。 可调电容具有具有第一晶体管和第二晶体管的第一差分放大器和具有第三晶体管和第四晶体管的第二差分放大器第一晶体管和第二晶体管的电性能与第三晶体管和第四晶体管的电性能互补 并且第一晶体管和第三晶体管的控制连接彼此连接。 第二晶体管和第四晶体管的控制连接彼此连接。 第一晶体管和第三晶体管的第二电流连接彼此连接，第二晶体管和第四晶体管的第二电流连接彼此连接。
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公开(公告)号：US07098750B2
公开(公告)日：2006-08-29
申请号：US10918844
申请日：2004-08-16
申请人： Mikhail Morkovich
发明人： Mikhail Morkovich
CPC分类号： H03B5/1231 , H03B5/1203 , H03B5/1243 , H03B2200/0042
摘要： A voltage controlled oscillator that can rapidly change frequencies over a wide range is disclosed. The voltage controlled oscillator has a transistor having a base, an emitter and a collector. An output port and a power supply port are connected to the collector. A high pass filter is connected between ground and the base of the transistor. A tuning element is connected between the high pass filter and ground. The tuning element includes a pair of varactor diodes. The varactor diodes have their cathodes connected together at a first node. A series combination of a resistor and inductor are connected between a tuning port and the first node. A capacitor is connected between the first node and the emitter.
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4.发明授权Variable capacitance circuit having on/off switch for variable capacitance function, and voltage controlled oscillator using the variable capacitance circuit 有权具有用于可变电容功能的开/关开关的可变电容电路，以及使用可变电容电路的压控振荡器公开(公告)号：US07279994B2
公开(公告)日：2007-10-09
申请号：US11129312
申请日：2005-05-16
申请人： Kotaro Takagi
发明人： Kotaro Takagi
CPC分类号： H03J5/244 , H03B2200/0062 , H03J3/18 , H03J3/20
摘要： A variable capacitance circuit capable of switching on and off a variable capacitance function, includes variable capacitance means formed such that variable capacitance elements whose capacitance values change according to a voltage value of a supplied capacitance control voltage are connected so as to be paired and a plurality pairs of variable capacitance elements are connected in parallel forming multiple stages; bias voltage generation means for generating bias voltages of different voltage values based on a constant voltage from a constant voltage source; and an on-off switch for the variable capacitance function, in which the variable capacitance function of the variable capacitance means is turned on by supplying the bias voltage to the variable capacitance element of each stage of the variable capacitance means and turned off by grounding the bias voltage of each voltage value.
摘要翻译： 能够接通和断开可变电容功能的可变电容电路包括可变电容装置，其形成为使得电容值根据所提供的电容控制电压的电压值而变化的可变电容元件被连接成成对且多个 成对的可变电容元件并联连接成多级; 偏置电压产生装置，用于基于来自恒定电压源的恒定电压产生不同电压值的偏置电压; 以及用于可变电容功能的开 - 关开关，其中可变电容装置的可变电容功能通过向可变电容装置的每一级的可变电容元件提供偏置电压而导通，并通过接地 每个电压值的偏置电压。
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5.发明授权Analog PLL circuit and method of controlling the oscillation of a voltage controlled oscillator 失效模拟PLL电路和控制压控振荡器振荡的方法
公开(公告)号：US6114917A
公开(公告)日：2000-09-05
申请号：US181617
申请日：1998-10-28
CPC分类号： H03L7/199 , H03L7/083 , H03L7/0995 , H03L7/10
摘要： The present invention provides an analog PLL circuit able to shorten a lockin time during which oscillating frequency and phase of a voltage controlling oscillator settle.An analog PLL circuit according to the present invention comprises a divider, a phase comparator, a charge pump, a low pass filter, a voltage controlling oscillator, and a divider. The voltage controlling oscillator has a ring oscillator composed of a plurality of logic inverting elements capable of changing the delay amount. During the reset period, the initial voltage is inputted to the voltage controlling oscillator via the analog switch, and the initial delay amount is set to each of the logic inverting elements. After the reset period finishes, at the point when the rising edge of the standard input signal is firstly inputted, the output of the D flip-flop becomes high level and the ring oscillator begins the oscillating operation.
摘要翻译： 本发明提供一种能够缩短锁定时间的模拟PLL电路，在此时间内，电压控制振荡器的振荡频率和相位稳定。 根据本发明的模拟PLL电路包括分频器，相位比较器，电荷泵，低通滤波器，电压控制振荡器和分频器。 电压控制振荡器具有由能够改变延迟量的多个逻辑反相元件组成的环形振荡器。 在复位期间，初始电压通过模拟开关输入到电压控制振荡器，并且将初始延迟量设置到每个逻辑反相元件。 复位周期结束后，在首次输入标准输入信号的上升沿时，D触发器的输出变为高电平，环形振荡器开始振荡。
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公开(公告)号：US6081137A
公开(公告)日：2000-06-27
申请号：US166960
申请日：1998-10-06
申请人： Sang-Shin Choi
发明人： Sang-Shin Choi
CPC分类号： H03K5/1534 , G01R23/15 , G01R23/005
摘要： A frequency detecting circuit is provided that includes a level shift detecting unit for generating pulse signals of a certain pulse width at each level shifting of input clock signals and a level detecting unit. The level detecting unit includes a charging unit and a discharging unit. The discharging unit is activated by the pulse signals of the level shift detecting unit to discharge the charges of the charging unit. An inverter having a logic threshold voltage receives electrical signals in accordance with the charged level of the charging unit to output a signal indicative of the frequency of the input clock signals.
摘要翻译： 提供了一种频率检测电路，其包括：电平移位检测单元，用于在输入时钟信号的每个电平移位和电平检测单元处产生一定脉冲宽度的脉冲信号。 电平检测单元包括充电单元和放电单元。 放电单元由电平移动检测单元的脉冲信号激活，以对充电单元的电荷进行放电。 具有逻辑阈值电压的逆变器根据充电单元的充电电平接收电信号，以输出表示输入时钟信号的频率的信号。
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