Patents by Inventor Albert Z. WANG
Albert Z. WANG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9819176Abstract: A low capacitance transient voltage suppressor is disclosed. The transient voltage suppressor comprises a first diode with a first anode thereof coupled to an I/O port. A first cathode of the first diode and a second cathode of a second diode are respectively coupled to two ends of a resistor. A second anode of the second diode is coupled to a low-voltage terminal. A third anode and a third cathode of a third diode are respectively coupled to the second cathode and the resistor. The third diode induces a third parasitic capacitance smaller than a first capacitance of the first diode and a second parasitic capacitance of the second diode, and the third parasitic capacitance in series with the first and second parasitic capacitances dominate a small capacitance in a path during normal operation.Type: GrantFiled: January 17, 2014Date of Patent: November 14, 2017Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventors: Albert Z. Wang, Wen-Chin Wu, Fei Yao, Bo Qin
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Patent number: 9741655Abstract: An integrated circuit common-mode electromagnetic interference filter incorporating electro-static discharge protection comprising two inductive coils is provided. A pair of primary and secondary spiral inductor coils is disposed corresponding to each other. A dielectric layer is used to separate the primary spiral inductor coil from the secondary spiral inductor coil electrically. Resistivity of a high-resistance substrate is more than 100 ?-cm for supporting the primary spiral inductor coil, the secondary spiral inductor coil and the dielectric layer thereon. The proposed filter structure can be formed in integrated circuit (IC) back-end processes and thus be extraordinarily advantageous of effectively eliminating electromagnetic interferences and having electrostatic protection effect at the same time, while having small footprint.Type: GrantFiled: January 15, 2013Date of Patent: August 22, 2017Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventors: Albert Z. Wang, Wen-Chin Wu, Shijun Wang, Nan Zhang
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Patent number: 9331661Abstract: An integrated circuit (IC) electromagnetic interference (EMI) filter with electrostatic discharge (ESD) protection incorporating inductor-capacitor (LC) resonance tanks is disclosed. The filter comprises at least one circuit composed of a diode and an inductor connected in series, wherein the diode induces a parasitic capacitance and the circuit is grounded. When a number of the circuit is two, a passive element is coupled between the two inductors and cooperates with them to induce two parasitic capacitances connected with the circuits. When a number of the circuit is one, two diodes respectively connect with the inductor through two passive elements. Each diode can induce a parasitic capacitance. The two passive elements and the inductor can induce a parasitic capacitance connected with the circuit.Type: GrantFiled: September 15, 2014Date of Patent: May 3, 2016Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventors: Albert Z. Wang, Wenchin Wu, Shijun Wang, Nan Zhang
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Patent number: 9246328Abstract: An integrated electromagnetic interference (EMI) filter circuit with electrostatic discharge (ESD) protection and incorporating capacitors is provided. At least one passive element, i.e. resistor or inductor is connected between an input terminal and an output terminal. A first capacitor is connected between ground and the input terminal, and a second capacitor is connected between ground and the output terminal. A first diode and a second diode are connected in parallel to the first capacitor and the second capacitor. One or multiple parallel capacitors are connected in parallel to the passive element and between the input terminal and the output terminal for frequency compensation by employing the novel EMI LPF circuit, it is extraordinarily advantageous of enhancing its rejection band attenuation and meanwhile maintaining high cut-off frequency while implementation.Type: GrantFiled: September 15, 2014Date of Patent: January 26, 2016Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventors: Albert Z. Wang, Wenchin Wu, Nan Zhang, Shijun Wang
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Publication number: 20150207312Abstract: A low capacitance transient voltage suppressor is disclosed. The transient voltage suppressor comprises a first diode with a first anode thereof coupled to an I/O port. A first cathode of the first diode and a second cathode of a second diode are respectively coupled to two ends of a resistor. A second anode of the second diode is coupled to a low-voltage terminal. A third anode and a third cathode of a third diode are respectively coupled to the second cathode and the resistor. The third diode induces a third parasitic capacitance smaller than a first capacitance of the first diode and a second parasitic capacitance of the second diode, and the third parasitic capacitance in series with the first and second parasitic capacitances dominate a small capacitance in a path during normal operation.Type: ApplicationFiled: January 17, 2014Publication date: July 23, 2015Applicant: Silergy Semiconductor Technology (Hangzhou) LTDInventors: Albert Z. WANG, Wen-Chin WU, Fei YAO, Bo Qin
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Publication number: 20150002969Abstract: An integrated circuit (IC) electromagnetic interference (EMI) filter with electrostatic discharge (ESD) protection incorporating inductor-capacitor (LC) resonance tanks is disclosed. The filter comprises at least one circuit composed of a diode and an inductor connected in series, wherein the diode induces a parasitic capacitance and the circuit is grounded. When a number of the circuit is two, a passive element is coupled between the two inductors and cooperates with them to induce two parasitic capacitances connected with the circuits. When a number of the circuit is one, two diodes respectively connect with the inductor through two passive elements. Each diode can induce a parasitic capacitance. The two passive elements and the inductor can induce a parasitic capacitance connected with the circuit.Type: ApplicationFiled: September 15, 2014Publication date: January 1, 2015Inventors: Albert Z. Wang, Wenchin Wu, Shijun Wang, Nan Zhang
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Publication number: 20150002968Abstract: An integrated electromagnetic interference (EMI) filter circuit with electrostatic discharge (ESD) protection and incorporating capacitors is provided. At least one passive element, i.e. resistor or inductor is connected between an input terminal and an output terminal. A first capacitor is connected between ground and the input terminal, and a second capacitor is connected between ground and the output terminal. A first diode and a second diode are connected in parallel to the first capacitor and the second capacitor. One or multiple parallel capacitors are connected in parallel to the passive element and between the input terminal and the output terminal for frequency compensation by employing the novel EMI LPF circuit, it is extraordinarily advantageous of enhancing its rejection band attenuation and meanwhile maintaining high cut-off frequency while implementation.Type: ApplicationFiled: September 15, 2014Publication date: January 1, 2015Inventors: Albert Z. Wang, Wenchin Wu, Nan Zhang, Shijun Wang
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Patent number: 8879223Abstract: An integrated electromagnetic interference (EMI) filter circuit with electrostatic discharge (ESD) protection and incorporating capacitors is provided. At least one passive element, i.e. resistor or inductor is connected between an input terminal and an output terminal. A first capacitor is connected between ground and the input terminal, and a second capacitor is connected between ground and the output terminal. A first diode and a second diode are connected in parallel to the first capacitor and the second capacitor. One or multiple parallel capacitors are connected in parallel to the passive element and between the input terminal and the output terminal for frequency compensation by employing the novel EMI LPF circuit, it is extraordinarily advantageous of enhancing its rejection band attenuation and meanwhile maintaining high cut-off frequency while implementation.Type: GrantFiled: January 15, 2013Date of Patent: November 4, 2014Assignee: Silergy Semiconductor Technology (Hangzhou) LtdInventors: Albert Z. Wang, Wen-Chin Wu, Nan Zhang, Shijun Wang
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Patent number: 8879230Abstract: An integrated circuit (IC) electromagnetic interference (EMI) filter with electrostatic discharge (ESD) protection incorporating inductor-capacitor (LC) resonance tanks is disclosed. The filter comprises at least one circuit composed of a diode and an inductor connected in series, wherein the diode induces a parasitic capacitance and the circuit is grounded. When a number of the circuit is two, a passive element is coupled between the two inductors and cooperates with them to induce two parasitic capacitances connected with the circuits. When a number of the circuit is one, two diodes respectively connect with the inductor through two passive elements. Each diode can induce a parasitic capacitance. The two passive elements and the inductor can induce a parasitic capacitance connected with the circuit.Type: GrantFiled: January 29, 2013Date of Patent: November 4, 2014Assignee: Silergy Semiconductor Technology (Hangzhou) LtdInventors: Albert Z. Wang, Wen-Chin Wu, Shijun Wang, Nan Zhang
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Publication number: 20140211348Abstract: An integrated circuit (IC) electromagnetic interference (EMI) filter with electrostatic discharge (ESD) protection incorporating inductor-capacitor (LC) resonance tanks is disclosed. The filter comprises at least one circuit composed of a diode and an inductor connected in series, wherein the diode induces a parasitic capacitance and the circuit is grounded. When a number of the circuit is two, a passive element is coupled between the two inductors and cooperates with them to induce two parasitic capacitances connected with the circuits. When a number of the circuit is one, two diodes respectively connect with the inductor through two passive elements. Each diode can induce a parasitic capacitance. The two passive elements and the inductor can induce a parasitic capacitance connected with the circuit.Type: ApplicationFiled: January 29, 2013Publication date: July 31, 2014Applicant: CITRUSCOM CORPORATIONInventors: Albert Z. WANG, Wen-Chin WU, Shijun WANG, Nan ZHANG
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Publication number: 20140198417Abstract: An integrated electromagnetic interference (EMI) filter circuit with electrostatic discharge (ESD) protection and incorporating capacitors is provided. At least one passive element, i.e. resistor or inductor is connected between an input terminal and an output terminal. A first capacitor is connected between ground and the input terminal, and a second capacitor is connected between ground and the output terminal. A first diode and a second diode are connected in parallel to the first capacitor and the second capacitor. One or multiple parallel capacitors are connected in parallel to the passive element and between the input terminal and the output terminal for frequency compensation by employing the novel EMI LPF circuit, it is extraordinarily advantageous of enhancing its rejection band attenuation and meanwhile maintaining high cut-off frequency while implementation.Type: ApplicationFiled: January 15, 2013Publication date: July 17, 2014Applicant: CITRUSCOM CORPORATIONInventors: Albert Z. WANG, Wen-Chin WU, Nan ZHANG, Shijun WANG
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Publication number: 20140198418Abstract: An integrated circuit common-mode electromagnetic interference filter incorporating electro-static discharge protection comprising two inductive coils is provided. A pair of primary and secondary spiral inductor coils is disposed corresponding to each other. A dielectric layer is used to separate the primary spiral inductor coil from the secondary spiral inductor coil electrically. Resistivity of a high-resistance substrate is more than 100 ?-cm for supporting the primary spiral inductor coil, the secondary spiral inductor coil and the dielectric layer thereon. The proposed filter structure can be formed in integrated circuit (IC) back-end processes and thus be extraordinarily advantageous of effectively eliminating electromagnetic interferences and having electrostatic protection effect at the same time, while having small footprint.Type: ApplicationFiled: January 15, 2013Publication date: July 17, 2014Applicant: CITRUSCOM CORPORATIONInventors: Albert Z. WANG, Wen-Chin WU, Shijun WANG, Nan ZHANG