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1. 发明申请

US20070047729A1 Subscriber Line Interface Circuit (SLIC) Including A Transient Output Current Limit Circuit And Related Method 审中-公开
标题翻译：用户线路接口电路（SLIC）包括瞬态输出限流电路及相关方法
公开(公告)号：US20070047729A1
公开(公告)日：2007-03-01
申请号：US11464262
申请日：2006-08-14
申请人： Douglas YOUNGBLOOD
发明人： Douglas YOUNGBLOOD
IPC分类号： H04M1/00
CPC分类号： H04M3/005 , H04M3/18 , H04M19/005
摘要： A subscriber line interface circuit (SLIC) for a subscriber loop includes a pair of output amplifiers for connection to the subscriber loop and a transient output current limit circuit. The transient output current limit circuit may have at least one programmable output current limit and limit respective output currents from the pair of output amplifiers based thereon. The transient output current limit circuit may limit both source and sink currents for each of the pair of output amplifiers.
摘要翻译：用户回路的用户线接口电路（SLIC）包括一对用于连接到用户回路的输出放大器和一个瞬态输出电流限制电路。瞬态输出电流限制电路可以具有至少一个可编程输出电流限制，并且基于此，限制来自该对输出放大器的相应输出电流。瞬态输出电流限制电路可以限制一对输出放大器中的每一个的源极和吸收电流。

2. 发明申请

US20060088155A1 Mode-dependent, multiple bias-driven battery switch for subscriber line interface circuit 失效
公开(公告)号：US20060088155A1
公开(公告)日：2006-04-27
申请号：US11295883
申请日：2005-12-07
申请人： Leonel Enriquez , Douglas Youngblood
发明人： Leonel Enriquez , Douglas Youngblood
IPC分类号： H04M1/00
CPC分类号： H04M1/7385 , H04M3/005 , H04M19/00
摘要： A mode-dependent, battery-coupling switch for a subscriber line interface circuit (SLIC) selectively adjusts its current requirements to provide optimal current handling capability irrespective of the mode of operation of the SLIC. Where current demands of the SLIC are relatively minimal (e.g., on-hook idle mode), the bias is set at a relatively small, default value. During high current demand, such as ringing and off-hook signaling, the bias is set at a relatively large value, to maintain a low voltage drop across the battery-coupling switch.

3. 发明授权

US07260103B2 Mode-dependent, multiple bias-driven battery switch for subscriber line interface circuit 失效
标题翻译：模式相关，用于用户线接口电路的多偏压驱动电池开关
公开(公告)号：US07260103B2
公开(公告)日：2007-08-21
申请号：US11295883
申请日：2005-12-07
申请人： Leonel Ernesto Enriquez , Douglas Youngblood
发明人： Leonel Ernesto Enriquez , Douglas Youngblood
IPC分类号： H04M1/00 , H04M9/00
CPC分类号： H04M1/7385 , H04M3/005 , H04M19/00
摘要： A mode-dependent, battery-coupling switch for a subscriber line interface circuit (SLIC) selectively adjusts its current requirements to provide optimal current handling capability irrespective of the mode of operation of the SLIC. Where current demands of the SLIC are relatively minimal (e.g., on-hook idle mode), the bias is set at a relatively small, default value. During high current demand, such as ringing and off-hook signaling, the bias is set at a relatively large value, to maintain a low voltage drop across the battery-coupling switch.
摘要翻译：用于用户线接口电路（SLIC）的模式相关的电池耦合开关选择性地调整其当前要求以提供最佳的电流处理能力，而与SLIC的操作模式无关。在SLIC的当前需求相对较小（例如，挂机空闲模式）的情况下，偏置被设置为相对较小的默认值。在高电流需求（例如振铃和摘机信号）期间，将偏压设置在相对较大的值，以保持电池耦合开关两端的低压降。

4. 发明申请

US20060115076A1 Programmable subscriber line circuit partitioned into high voltage interface and digital control subsections 有权
公开(公告)号：US20060115076A1
公开(公告)日：2006-06-01
申请号：US11295901
申请日：2005-12-07
申请人： Leonel Enriquez , Douglas Youngblood , Edward Berrios
发明人： Leonel Enriquez , Douglas Youngblood , Edward Berrios
IPC分类号： H04M1/00
CPC分类号： H04M3/005 , H04M1/7385
摘要： A subscriber line interface circuit has a battery-powered, high voltage analog section, that drives tip and ring lines of a subscriber loop, and a mixed signal (low voltage and digital signal processing) section, that monitors and controls the high voltage analog section. An input signal receiving unit of the high voltage analog section conditions input voice and low voltage signaling and ringing signals from the mixed signal section, for application to a dual mode, programmable gain, tip/ring amplifier coupled to the loop. A sense amplifier at the output of the tip/ring amplifier is through an auxiliary amplifier to an analog feedback monitor port for closing a loop to synthesize the circuit's output impedance.

5. 发明授权

US07050577B2 Programmable subscriber line circuit partitioned into high voltage interface and digital control subsections 有权
公开(公告)号：US07050577B2
公开(公告)日：2006-05-23
申请号：US10091976
申请日：2002-03-06
申请人： Leonel Ernesto Enriquez , Douglas Youngblood , Edward A. Berrios
发明人： Leonel Ernesto Enriquez , Douglas Youngblood , Edward A. Berrios
IPC分类号： H04M1/00 , H04M9/00 , H04M9/08
CPC分类号： H04M3/005 , H04M1/7385
摘要： A subscriber line interface circuit has a battery-powered, high voltage analog section, that drives tip and ring lines of a subscriber loop, and a mixed signal (low voltage and digital signal processing) section, that monitors and controls the high voltage analog section. An input signal receiving unit of the high voltage analog section conditions input voice and low voltage signaling and ringing signals from the mixed signal section, for application to a dual mode, programmable gain, tip/ring amplifier coupled to the loop. A sense amplifier at the output of the tip/ring amplifier is through an auxiliary amplifier to an analog feedback monitor port for closing a loop to synthesize the circuit's output impedance.

6. 发明授权

US07130414B2 Active mode line voltage regulator for ringing subscriber line interface circuit 有权
公开(公告)号：US07130414B2
公开(公告)日：2006-10-31
申请号：US10090291
申请日：2002-03-04
申请人： Leonel Ernesto Enriquez , Douglas Youngblood
发明人： Leonel Ernesto Enriquez , Douglas Youngblood
IPC分类号： H04M19/00
CPC分类号： H04M19/005 , H04M1/745
摘要： A voltage regulator circuit arrangement limits the DC voltage applied to a tip and ring amplifiers of a subscriber line interface circuit (SLIC), each of which has a first polarity input coupled to a first current flow path to which a DC input (battery) voltage is coupled. A first current source supplies a first current derived via a low pass filter path from that flowing through the first current flow path to a second polarity input node of the tip amplifier, while a second current source supplies a similarly low pass filter path-derived second current to a second polarity input node of the ring amplifier. A voltage regulator is coupled with the first current flow path and is operative to regulate the voltage at the first polarity inputs of the tip and ring amplifiers to a regulated voltage value Vreg, so that the magnitudes of the first and second currents are based upon the regulated voltage value Vreg.

7. 发明授权

US07003103B2 Mode-dependent, multiple bias-driven battery switch for subscriber line interface circuit 失效
公开(公告)号：US07003103B2
公开(公告)日：2006-02-21
申请号：US10177706
申请日：2002-06-21
申请人： Leonel Ernesto Enriquez , Douglas Youngblood
发明人： Leonel Ernesto Enriquez , Douglas Youngblood
IPC分类号： H04M1/00 , H04M9/00 , H04M9/08
CPC分类号： H04M1/7385 , H04M3/005 , H04M19/00
摘要： A mode-dependent, battery-coupling switch for a subscriber line interface circuit (SLIC) selectively adjusts its current requirements to provide optimal current handling capability irrespective of the mode of operation of the SLIC. Where current demands of the SLIC are relatively minimal (e.g., on-hook idle mode), the bias is set at a relatively small, default value. During high current demand, such as ringing and off-hook signaling, the bias is set at a relatively large value, to maintain a low voltage drop across the battery-coupling switch.

8. 发明申请

US20060028276A1 CMOS-configured transconductance amplifier circuit 失效
公开(公告)号：US20060028276A1
公开(公告)日：2006-02-09
申请号：US10910704
申请日：2004-08-03
申请人： Douglas Youngblood
发明人： Douglas Youngblood
IPC分类号： H03F3/18
CPC分类号： H03F3/45085 , H03F1/34 , H03F3/4508 , H03F3/45098 , H03F3/45475 , H03F2203/45288 , H03F2203/45356
摘要： A CMOS-implemented transconductance amplifier has an input gain stage coupled to a CMOS output stage. The inverting input of the input gain stage is coupled to an input/output port to which an input voltage is coupled. The CMOS output stage has a first, transconductance CMOS transistor pair, whose source-drain paths are series-coupled between first and second outputs of the input stage. A second, transimpedance CMOS transistor pair have their source-drain paths series-coupled between first and second power supply terminals, and gate inputs coupled to outputs of the input stage. A third CMOS transistor pair is coupled in parallel with the second CMOS transistor pair to form a pair of current mirror stages. The current output is coupled to a common connection of the third CMOS pair.

9. 发明申请

US20060008077A1 Speech amplifier-resident mechanism for controllably supplying power to a line circuit 有权
标题翻译：用于可控地向线路电路供电的语音放大器驻留机构
公开(公告)号：US20060008077A1
公开(公告)日：2006-01-12
申请号：US10887935
申请日：2004-07-09
申请人： Douglas Youngblood
发明人： Douglas Youngblood
IPC分类号： H04M9/00
CPC分类号： H04M9/00
摘要： A voltage-coupling and loop current supply mechanism controllably turns on an output transistor within the tip amplifier circuitry portion of the speech amplifier to controllably apply a prescribed voltage to the telephone line during on-hook/standby mode. This controllably applied voltage serves as a source of loop current when the phone goes off-hook. The ring lead portion of the tip/ring wireline pair is connected to a controlled current sink, which is coupled to the output of a voltage regulator referenced to the battery voltage. This controlled current sink is used to sink a prescribed loop current from the tip/ring pair when the phone goes off-hook. When the phone goes off-hook and loop current is detected, the voltage-supply mechanism provided by the tip amplifier's output transistor is terminated, and the speech amplifier is placed in its normal speech amplifier mode.
摘要翻译：电压耦合和回路电流供应机构可控制地打开语音放大器的尖端放大器电路部分内的输出晶体管，以在挂机/待机模式期间可控地将规定的电压施加到电话线路。当手机摘机时，可控制的电压用作回路电流源。尖端/环线电缆对的环形引线部分连接到受控电流吸收器，其被耦合到参考电池电压的电压调节器的输出。当电话摘机时，该受控电流吸收器用于从尖端/环对中吸收规定的回路电流。当检测到手机摘机和回路电流时，由端头放大器的输出晶体管提供的电压供给机构终止，语音放大器处于其正常的语音放大模式。

10. 发明申请

US20050057482A1 Multiple channel programmable gamma correction voltage generator 失效
标题翻译：多通道可编程伽玛校正电压发生器
公开(公告)号：US20050057482A1
公开(公告)日：2005-03-17
申请号：US10766197
申请日：2004-01-28
申请人： Douglas Youngblood , Steven Smith
发明人： Douglas Youngblood , Steven Smith
IPC分类号： G09G3/36
CPC分类号： G09G3/3688 , G09G2310/027 , G09G2320/0247 , G09G2320/0276 , G09G2320/0606 , G09G2320/0673
摘要： A multiple channel programmable gamma correction voltage generator including a resistor ladder, buffers, select logic, and a programmable non-volatile memory device. The memory provides select values indicative of one or more stored gamma correction values. The resistor ladder includes adjustable tap resistors distributed along the resistor ladder. The adjustable tap resistors provide multiple tap voltages distributed according to the gamma correction value. The buffers receive the tap voltages and provide gamma correction voltages. The select logic selects tap points of the adjustable tap resistors to select the tap voltages based on the select values stored in the memory. Additional resistors and switch logic may be included to enable re-positioning of the adjustable tap resistor within the resistor ladder. Latches and address control may be provided on the memory to enable programming and selection of multiple gamma correction values.
摘要翻译：多通道可编程伽玛校正电压发生器，包括电阻梯形图，缓冲器，选择逻辑和可编程非易失性存储器件。存储器提供指示一个或多个存储的伽马校正值的选择值。电阻梯包括沿电阻梯分布的可调节分接电阻器。可调节抽头电阻提供根据伽马校正值分布的多个抽头电压。缓冲器接收抽头电压并提供伽马校正电压。选择逻辑选择可调节抽头电阻的抽头，根据存储在存储器中的选择值来选择抽头电压。可以包括附加的电阻和开关逻辑，以使可调节抽头电阻器能够重新定位在电阻梯内。可以在存储器上提供锁存和地址控制以使得能够编程和选择多个伽马校正值。

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