Patents by Inventor Fenghao Mu
Fenghao Mu 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).
-
Patent number: 11418149Abstract: A configurable passive mixer is described herein. According to one exemplary embodiment, a passive mixer for a wireless receiver comprises a plurality of passive mixer cores coupled in parallel with each mixer core configured to receive a same set of radio frequency input signals and a separately driven set of local oscillator input signals. Further, each mixer core is configured to be separately enabled or disabled so that the passive mixer can be selectively configured during operation to convert the same set of radio frequency input signals to a set of downconverted output signals that satisfy a certain performance requirement or performance parameter of the passive mixer.Type: GrantFiled: August 11, 2017Date of Patent: August 16, 2022Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Fenghao Mu, Fredrik Tillman
-
Patent number: 11290064Abstract: An amplifier for a receiver circuit is disclosed. The amplifier has an input node (Vin) and an output node (Vout). It comprises a tunable tank circuit connected to the output node (Vout), a feedback circuit path connected between the output node (Vout) and the input node (Vin), and a tunable capacitor connected between an internal node of the feedback circuit path and a reference-voltage node. A receiver circuit and a communication apparatus is disclosed as well.Type: GrantFiled: April 28, 2020Date of Patent: March 29, 2022Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)Inventor: Fenghao Mu
-
Patent number: 10904047Abstract: A technique for cancelling or reducing crosstalk signals between controlled oscillators in an integrated circuit is provided. The technique involves an arrangement adapted to reduce a crosstalk signal generated by a first controlled oscillator to a second oscillator both comprised in the integrated circuit, wherein both controlled oscillators are configured to output a respective clock signal. The arrangement comprises a detector adapted to detect the crosstalk signal generated by the first controlled oscillator to the second controlled oscillator, a crosstalk cancellation circuit adapted to generate a cancellation signal having an amplitude substantially the same as that of the crosstalk signal and a phase substantially opposite to that of the crosstalk signal, and a cancellation signal injector adapted to introduce the cancellation signal into the second controlled oscillator.Type: GrantFiled: October 10, 2019Date of Patent: January 26, 2021Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Fenghao Mu, Lars Sundström
-
Patent number: 10790808Abstract: A passable latch circuit and variable delay chains built with one or more passable latch circuits are disclosed. The passable latch circuit has a dynamic latch including a first P-transistor, a first N-transistor, a second P-transistor, a second N-transistor and a clock input circuitry. The passable latch circuit further includes a control switch connected between the gates of the second P-transistor and the second N-transistor. The control switch has an on state and an off state, and the passable latch circuit is configured to have different delays by controlling the state of the control switch.Type: GrantFiled: January 24, 2017Date of Patent: September 29, 2020Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventor: Fenghao Mu
-
Publication number: 20200259466Abstract: An amplifier for a receiver circuit is disclosed. The amplifier has an input node (Vin) and an output node (Vout). It comprises a tunable tank circuit connected to the output node (Vout), a feedback circuit path connected between the output node (Vout) and the input node (Vin), and a tunable capacitor connected between an internal node of the feedback circuit path and a reference-voltage node. A receiver circuit and a communication apparatus is disclosed as well.Type: ApplicationFiled: April 28, 2020Publication date: August 13, 2020Inventor: Fenghao MU
-
Patent number: 10673393Abstract: An amplifier for a receiver circuit is disclosed. The amplifier has an input node (Vin) and an output node (Vout). It comprises a tunable tank circuit connected to the output node (Vout), a feedback circuit path connected between the output node (Vout) and the input node (Vin), and a tunable capacitor connected between an internal node of the feedback circuit path and a reference-voltage node. A receiver circuit and a communication apparatus is disclosed as well.Type: GrantFiled: May 29, 2019Date of Patent: June 2, 2020Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)Inventor: Fenghao Mu
-
Patent number: 10665958Abstract: A beamforming receiver 100 for receiving multiple radio signals and generating multiple output beam signals is disclosed. The beamforming receiver (100) comprises multiple beam parameter inputs (130) to receive multiple beam parameters and an element array (110) comprising a plurality of elements (120). The beamforming receiver 100 further comprises a loading unit 140 coupled to each element 120 in the element array 110. The beamforming receiver 100 further comprises a reference clock generating and splitting circuit 150 to generate and distribute reference clock signals for each element 120.Type: GrantFiled: March 19, 2015Date of Patent: May 26, 2020Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventor: Fenghao Mu
-
Publication number: 20200127651Abstract: A passable latch circuit and variable delay chains built with one or more passable latch circuits are disclosed. The passable latch circuit has a dynamic latch including a first P-transistor, a first N-transistor, a second P-transistor, a second N-transistor and a clock input circuitry. The passable latch circuit further includes a control switch connected between the gates of the second P-transistor and the second N-transistor. The control switch has an on state and an off state, and the passable latch circuit is configured to have different delays by controlling the state of the control switch.Type: ApplicationFiled: January 24, 2017Publication date: April 23, 2020Inventor: Fenghao MU
-
Patent number: 10630264Abstract: An attenuator for attenuating a signal is disclosed. The attenuator comprises a differential input port with a positive input node and a negative input node to receive the signal; and a differential output port with a positive output node and a negative output node to output the attenuated signal. The attenuator further comprises a first switched resistor network connected between the positive input node and the positive output node; and a second switched resistor network connected between the negative input node and the negative output node. Further a pair of compensation paths is connected to the first and second switched resistor networks for cancellation their parasitic leakages, where a first compensation path is connected between the positive input node and the negative output node, and a second compensation path is connected between the negative input node and the positive output node.Type: GrantFiled: May 24, 2019Date of Patent: April 21, 2020Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)Inventors: Fenghao Mu, Sven Mattisson
-
Publication number: 20200044898Abstract: A technique for cancelling or reducing crosstalk signals between controlled oscillators in an integrated circuit is provided. The technique involves an arrangement adapted to reduce a crosstalk signal generated by a first controlled oscillator to a second oscillator both comprised in the integrated circuit, wherein both controlled oscillators are configured to output a respective clock signal. The arrangement comprises a detector adapted to detect the crosstalk signal generated by the first controlled oscillator to the second controlled oscillator, a crosstalk cancellation circuit adapted to generate a cancellation signal having an amplitude substantially the same as that of the crosstalk signal and a phase substantially opposite to that of the crosstalk signal, and a cancellation signal injector adapted to introduce the cancellation signal into the second controlled oscillator.Type: ApplicationFiled: October 10, 2019Publication date: February 6, 2020Applicant: Telefonaktiebolaget LM Ericsson (publ)Inventors: Fenghao MU, Lars SUNDSTRÖM
-
Patent number: 10498308Abstract: A circuit for calibration measurements comprises a first and a second current source arranged to provide current outputs; a resistor connected between the first current source and a reference voltage; a capacitor connected between the second current source and the reference voltage; a discharge switch connected in parallel with the capacitor and arranged to selectively discharge the capacitor; a comparator circuit arranged to compare voltages across the resistor and the capacitor and output a signal when voltage across the capacitor reaches the voltage across the resistor; and a controller having a clock signal input and connected to the output of the comparator circuit.Type: GrantFiled: November 27, 2013Date of Patent: December 3, 2019Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)Inventors: Staffan Ek, Fenghao Mu, Martin Anderson
-
Patent number: 10484214Abstract: A technique for cancelling or reducing crosstalk signals between controlled oscillators in an integrated circuit is provided. The technique involves an arrangement adapted to reduce a crosstalk signal generated by a first controlled oscillator to a second oscillator both comprised in the integrated circuit, wherein both controlled oscillators are configured to output a respective clock signal. The arrangement comprises a detector adapted to detect the crosstalk signal generated by the first controlled oscillator to the second controlled oscillator, a crosstalk cancellation circuit adapted to generate a cancellation signal having an amplitude substantially the same as that of the crosstalk signal and a phase substantially opposite to that of the crosstalk signal, and a cancellation signal injector adapted to introduce the cancellation signal into the second controlled oscillator.Type: GrantFiled: February 8, 2018Date of Patent: November 19, 2019Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Fenghao Mu, Lars Sundström
-
Publication number: 20190280672Abstract: An attenuator for attenuating a signal is disclosed. The attenuator comprises a differential input port with a positive input node and a negative input node to receive the signal; and a differential output port with a positive output node and a negative output node to output the attenuated signal. The attenuator further comprises a first switched resistor network connected between the positive input node and the positive output node; and a second switched resistor network connected between the negative input node and the negative output node. Further a pair of compensation paths is connected to the first and second switched resistor networks for cancellation their parasitic leakages, where a first compensation path is connected between the positive input node and the negative output node, and a second compensation path is connected between the negative input node and the positive output node.Type: ApplicationFiled: May 24, 2019Publication date: September 12, 2019Inventors: Fenghao MU, Sven MATTISSON
-
Publication number: 20190280656Abstract: An amplifier for a receiver circuit is disclosed. The amplifier has an input node (Vin) and an output node (Vout). It comprises a tunable tank circuit connected to the output node (Vout), a feedback circuit path connected between the output node (Vout) and the input node (Vin), and a tunable capacitor connected between an internal node of the feedback circuit path and a reference-voltage node. A receiver circuit and a communication apparatus is disclosed as well.Type: ApplicationFiled: May 29, 2019Publication date: September 12, 2019Inventor: Fenghao MU
-
Patent number: 10361892Abstract: A transmitter comprising a power amplifier, a phase modulator, a switched DC-DC converter, all operating in dual mode, and a controller is disclosed. The power amplifier is arranged to selectively operate either in a first mode or in a second mode, wherein the first mode is a linear mode and the second mode is a non-linear mode in order to save power with least increasing cost in hardware. The transmitter is adapted to operate at different allocated bandwidths, for different radio standards while keeping minimum power consumption governed by the controller. A transceiver, a communication device, a method and a computer program are also disclosed.Type: GrantFiled: April 16, 2018Date of Patent: July 23, 2019Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Fenghao Mu, Bengt Lindoff
-
Patent number: 10320341Abstract: An amplifier for a receiver circuit is disclosed. The amplifier has an input node (Vin) and an output node (Vout). It comprises a tunable tank circuit connected to the output node (Vout), a feedback circuit path connected between the output node (Vout) and the input node (Vin), and a tunable capacitor connected between an internal node of the feedback circuit path and a reference-voltage node. A receiver circuit and a communication apparatus is disclosed as well.Type: GrantFiled: May 2, 2016Date of Patent: June 11, 2019Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)Inventor: Fenghao Mu
-
Patent number: 10305450Abstract: An attenuator for attenuating a signal is disclosed. The attenuator comprises a differential input port with a positive input node and a negative input node to receive the signal; and a differential output port with a positive output node and a negative output node to output the attenuated signal. The attenuator further comprises a first switched resistor network connected between the positive input node and the positive output node; and a second switched resistor network connected between the negative input node and the negative output node. Further a pair of compensation paths is connected to the first and second switched resistor networks for cancellation their parasitic leakages, where a first compensation path is connected between the positive input node and the negative output node, and a second compensation path is connected between the negative input node and the positive output node.Type: GrantFiled: December 3, 2014Date of Patent: May 28, 2019Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)Inventors: Fenghao Mu, Sven Mattisson
-
Publication number: 20180337659Abstract: An attenuator for attenuating a signal is disclosed. The attenuator comprises a differential input port with a positive input node and a negative input node to receive the signal; and a differential output port with a positive output node and a negative output node to output the attenuated signal. The attenuator further comprises a first switched resistor network connected between the positive input node and the positive output node; and a second switched resistor network connected between the negative input node and the negative output node. Further a pair of compensation paths is connected to the first and second switched resistor networks for cancellation their parasitic leakages, where a first compensation path is connected between the positive input node and the negative output node, and a second compensation path is connected between the negative input node and the positive output node.Type: ApplicationFiled: December 3, 2014Publication date: November 22, 2018Inventors: Fenghao MU, Sven MATTISSON
-
Publication number: 20180241594Abstract: A transmitter comprising a power amplifier, a phase modulator, a switched DC-DC converter, all operating in dual mode, and a controller is disclosed. The power amplifier is arranged to selectively operate either in a first mode or in a second mode, wherein the first mode is a linear mode and the second mode is a non-linear mode in order to save power with least increasing cost in hardware. The transmitter is adapted to operate at different allocated bandwidths, for different radio standards while keeping minimum power consumption governed by the controller. A transceiver, a communication device, a method and a computer program are also disclosed.Type: ApplicationFiled: April 16, 2018Publication date: August 23, 2018Inventors: Fenghao Mu, Bengt Lindoff
-
Patent number: 10033561Abstract: A transmitter comprising a power amplifier, a phase modulator, a switched DC-DC converter, all operating in dual mode, and a controller is disclosed. The power amplifier is arranged to selectively operate either in a first mode or in a second mode, wherein the first mode is a linear mode and the second mode is a non-linear mode in order to save power with least increasing cost in hardware. The transmitter is adapted to operate at different allocated bandwidths, for different radio standards while keeping minimum power consumption governed by the controller. A transceiver, a communication device, a method and a computer program are also disclosed.Type: GrantFiled: June 16, 2017Date of Patent: July 24, 2018Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Fenghao Mu, Bengt Lindoff