Patents Assigned to ACP Advanced Circuit Pursuit AG
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Patent number: 8427233Abstract: A transconductor for providing an output current that is linear in the input voltage (Vin) comprises a main output transconductor (Ms, Mc) and a model transconductor (Msr1, Msr2, Mcr1, Mcr2) is comprised in a predistortion circuit (A), which measures the output of the model transconductor and the overall voltage input (Vin) to provide a control signal (Vc, Vc?) for the transconductors that compensates for their non-linearity.Type: GrantFiled: February 16, 2012Date of Patent: April 23, 2013Assignee: ACP Advanced Circuit Pursuit AGInventors: Qiuting Huang, Dimitrios Filippos Papadopoulos, Jurgen Rogin
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Publication number: 20120206199Abstract: A transconductor for providing an output current that is linear in the input voltage (Vin) comprises a main output transconductor (Ms, Mc) and a model transconductor (Msr1, Msr2, Mcr1, Mcr2) is comprised in a predistortion circuit (A), which measures the output of the model transconductor and the overall voltage input (Vin) to provide a control signal (Vc, Vc?) for the transconductors that compensates for their non-linearity.Type: ApplicationFiled: February 16, 2012Publication date: August 16, 2012Applicant: ACP Advanced Circuit Pursuit AGInventors: Qiuting Huang, Dimitrios Filippos Papadopoulos, Jurgen Rogin
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Patent number: 8149052Abstract: A transconductor for providing an output current that is linear in the input voltage (Vin) comprises a main output transconductor (Ms, Mc) and a model transconductor (Msr1, Msr2, Mcr1, Mcr2) that are controlled by the same signal (Vc, Vc?). The latter transconductor (Msr1, Msr2, Mcr1, Mcr2) is comprised in a predistortion circuit (A), which measures the output of the model transconductor and the overall voltage input (Vin) to provide a control signal (Vc, Vc?) for the transconductors that compensates for their non-linearity.Type: GrantFiled: April 17, 2008Date of Patent: April 3, 2012Assignee: ACP Advanced Circuit Pursuit AGInventors: Qiuting Huang, Dimitrios Filippos Papadopoulos, Jurgen Rogin
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Patent number: 8004342Abstract: A double-balanced mixer is provided having a shorting switch connecting the signal inputs to the mixer core. A timer circuit provides pulses to close the switch, thereby shorting those inputs at times when the switches of the mixer core are switching. This is done because non-linear components in the output are produced at those times and therefore they can be removed if the signal input is shorted at those times.Type: GrantFiled: February 8, 2008Date of Patent: August 23, 2011Assignee: ACP Advanced Circuit Pursuit AGInventors: Qiuting Huang, Dimitrios Filippos Papadopoulos
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Publication number: 20100253441Abstract: A variable simulated inductor comprises an integrator connected to receive the voltage across the input to the circuit. The output of the inductor is connected to a control terminal of a transconductor connected across the input of the circuit. The gain of the transconductor is electronically controllable in order to control the inductance of the circuit. An oscillator using a variable simulated inductor and a piezoelectric resonator connected in parallel is also provided.Type: ApplicationFiled: December 12, 2008Publication date: October 7, 2010Applicant: ACP Advanced Circuit Pursuit AGInventor: Qiuting Huang
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Publication number: 20100182091Abstract: A transconductor for providing an output current that is linear in the input voltage (Vin) comprises a main output transconductor (Ms, Mc) and a model transconductor (Msr1, Msr2, Mcr1, Mcr2) that are controlled by the same signal (Vc, Vc?). The latter transconductor (Msr1, Msr2, Mcr1, Mcr2) is comprised in a predistortion circuit (A), which measures the output of the model transconductor and the overall voltage input (Vin) to provide a control signal (Vc, Vc?) for the transconductors that compensates for their non-linearity.Type: ApplicationFiled: April 17, 2008Publication date: July 22, 2010Applicant: ACP Advanced Circuit Pursuit AGInventors: Qiuting Huang, Dimitrios Filippos Papadopoulos, Jurgen Rogin
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Publication number: 20100117712Abstract: A double-balanced mixer is provided having a shorting switch connecting the signal inputs to the mixer core. A timer circuit provides pulses to close the switch, thereby shorting those inputs at times when the switches of the mixer core are switching. This is done because non-linear components in the output are produced at those times and therefore they can be removed if the signal input is shorted at those times.Type: ApplicationFiled: February 8, 2008Publication date: May 13, 2010Applicant: ACP Advanced Circuit Pursuit AGInventors: Qiuting Huang, Dimitrios Filippos Papadopoulos
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Publication number: 20080032646Abstract: A double balanced mixer has a DC detection circuit connected to receive the output of the mixer core. The detected level is applied to adjust the duty cycle of the transistors of the mixer core. In one example, this adjusting level is added to the local oscillator signals that are applied to the core. In another example, the level is applied to adjust the threshold of the transistors of the mixer core. In a further example, the duty cycle of the local oscillator signals is adjusted before it is applied to the mixer core Also provided is an input stage for a double balanced mixer core, which comprises a transistor having a low pass filter as a feedback circuit.Type: ApplicationFiled: January 1, 2005Publication date: February 7, 2008Applicant: ACP Advanced Circuit Pursuit AGInventors: Qiuting Huang, Jurgen Rogin