Configurable wireless charging transmit and receive monitoring device
First Claim
1. An integrated circuit comprising:
- N shared input/output (I/O) connections, each of the N shared I/O connections being configured to connect to N respective coils, wherein N is a positive integer greater than 1;
an analog multiplexer having N mux inputs each connected to a respective one of the N shared I/O connections, the analog multiplexer configured to direct an AC input signal from a selected one of the N mux inputs to a mux output when the analog multiplexer is enabled;
a receiver circuit configured to receive the AC input signal and convert the AC input signal to a digital signal;
a digital signal processor (DSP) configured to process the digital signal in accordance with a predetermined configuration and output processed data;
a pulse width modulation (PWM) generator configured to output PWM signals in accordance with a PWM control signal;
N gate drivers connected such that each respective gate driver receives a PWM signal from the PWM generator and a respective gate driver enable signal, each gate driver being configured to transmit an AC signal relative to the PWM signal only when enabled by the respective gate driver enable signal, the AC signal being provided to the respective one of the N shared I/O connections;
a control portion configured to provide mux enable and mux select signals to the analog multiplexer and to provide respective gate driver enable signals to respective N gate drivers in accordance with the predetermined configuration, such that when the analog multiplexer is not enabled by the mux enable signal, any of the N gate drivers can be enabled by the respective gate driver enable signal, and such that when the analog multiplexer is enabled by the mux enable signal and the mux select signal designates the selected one of the N mux inputs then any of the N gate drivers can be enabled by the respective gate driver enable signal except for one of the N gate drivers that is respective to the selected one of the N mux inputs.
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Accused Products
Abstract
A configurable transmit/receive multiplexed coil monitoring (CMCM) device is provided having a plurality of dual function I/O connections connectable to a plurality of coils. The CMCM device is configurable to selectively drive AC transmit signals to any of the plurality of dual function I/O connections, while simultaneously monitoring voltage and phase information received as AC voltages at the dual function I/O connections in a multiplexed manner. The CMCM device is further configured such that while a selected I/O connection is selected to receive voltage and phase information from a particular I/O connection, no AC transmit signal can be driven to that selected particular I/O connection. Embodiments may include a multiplexer and one or more receive circuits configured to receive and digitalize received AC signals for processing by a digital signal processor. Embodiments may also include selectable Class-D drivers connected to the plurality of I/O connection, wherein each Class-D driver may be configured to receive pulse width modulation (PWM) signals from a PWM circuit for amplification and output as an AC transmit signal.
32 Citations
20 Claims
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1. An integrated circuit comprising:
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N shared input/output (I/O) connections, each of the N shared I/O connections being configured to connect to N respective coils, wherein N is a positive integer greater than 1; an analog multiplexer having N mux inputs each connected to a respective one of the N shared I/O connections, the analog multiplexer configured to direct an AC input signal from a selected one of the N mux inputs to a mux output when the analog multiplexer is enabled; a receiver circuit configured to receive the AC input signal and convert the AC input signal to a digital signal; a digital signal processor (DSP) configured to process the digital signal in accordance with a predetermined configuration and output processed data; a pulse width modulation (PWM) generator configured to output PWM signals in accordance with a PWM control signal; N gate drivers connected such that each respective gate driver receives a PWM signal from the PWM generator and a respective gate driver enable signal, each gate driver being configured to transmit an AC signal relative to the PWM signal only when enabled by the respective gate driver enable signal, the AC signal being provided to the respective one of the N shared I/O connections; a control portion configured to provide mux enable and mux select signals to the analog multiplexer and to provide respective gate driver enable signals to respective N gate drivers in accordance with the predetermined configuration, such that when the analog multiplexer is not enabled by the mux enable signal, any of the N gate drivers can be enabled by the respective gate driver enable signal, and such that when the analog multiplexer is enabled by the mux enable signal and the mux select signal designates the selected one of the N mux inputs then any of the N gate drivers can be enabled by the respective gate driver enable signal except for one of the N gate drivers that is respective to the selected one of the N mux inputs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A configurable transmit/receive (TX/RX) device for driving and receiving signals between at least two coils in an array of coils comprising:
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N inputs and N outputs (I/Os) that share a same respective N input and N output (N I/O) connections, wherein N is a positive integer greater than 1; an analog multiplexer having N mux inputs each connected to a respective one of the N I/O connections, the analog multiplexer further comprising M mux outputs, where M<
N, the analog multiplexer configured to direct M AC input signals from each one of M selected ones of the N mux inputs to respective M mux outputs when the analog multiplexer is enabled;M receiver circuits each configured to receive a respective one of the selected AC input signals from respective M mux outputs and convert the respective selected AC input signal to one of M respective digital signals; a digital signal processor circuit (DSP) configured to process each of the M respective digital signals in accordance with a predetermined DSP configuration and output processed data adapted for use by an external device; a pulse width modulation (PWM) generator configured to output PWM signals in accordance with a PWM control signal; N gate drivers connected such that each respective one of the N gate drivers receives a PWM signal from the PWM generator, each respective one of the N gate drivers further receives one of N respective gate driver enable signals, each gate driver being configured to transmit an AC signal relative to its received PWM signal to the respective I/O connection only when enabled by its respective one of the N gate driver enable signals; a control portion configured to provide mux enable and mux select signals to the analog multiplexer and to provide the N respective gate driver enable signals to respective ones of the N gate drivers in accordance with the predetermined DSP configuration and such that when the analog multiplexer is not enabled by the mux enable signal any of the N gate drivers can be enabled by the N respective gate driver enable signals, and such that when the analog multiplexer is enabled by the analog mux enable signal and the mux select signal designates the M selected ones of the N mux inputs, then any of the N gate drivers can be enabled by the N respective gate driver enable signals except for M gate drivers that are respective to the M selected ones of the N mux inputs. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification