System and method for dynamic power-optimization of analog active filters
AssigneeThe Trustees of Columbia University in the City of New York
InventorsMehmet T. Ozgun, Yannis P. Tsividis
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Abstract
A circuit including two operational amplifiers connected in parallel. For the purpose of this explanation, assume that an equivalent input noise of a circuit with one operational amplifier is too high. Where two operational amplifiers, are connected in parallel, the signals from the operational amplifiers add as currents at the output node of the parallel combination.
Claims16
An analog signal processor for dynamic power-scaling having an input for receiving an input signal and an output for outputting a power-scaled signal characterized by an envelope, comprising:
- (a) one or more impedance blocks, each having an input and an output and being selectable such that when selected, the selected impedance block input is connected to the analog signal processor input to receive the input signal, the selected impedance block processes the input signal, and the impedance block processed input signal is provided to the selected impedance block output;
- (b) one or more amplifier blocks, each having an input and an output and being selectable such that when selected, the input of the selected amplifier block is connected to the output of the selected impedance block to receive the impedance block processed signal, the selected amplifier block amplifies the impedance block processed signal/and the amplified signal is provided to the selected amplifier block output, wherein the selected amplifier block is selected based at least in part by the envelope of the output signal of the analog signal processor;
- and (c) one or more filter banks, each having an input and an output and being selectable such that when selected, the input of the selected filter bank is connected to the output of the selected amplifier block to receive the amplified signal, the output of the selected filter bank is connected to the output of the analog signal processor, the selected filter bank filters the amplified signal, and the filtered signal is provided to the selected filter bank output.
A method for the dynamic power-optimization of analog active filters, comprising:
- (a) receiving an input signal at an analog signal processor which generates a power-scaled output signal characterized by an envelope, (b) selecting one or more impedance blocks, each having an input and an output and being selectable such that when selected, the selected impedance block input is connected to the analog signal processor input to receive the input signal, the selected impedance block processes the input signal, and the impedance block processed input signal is provided to the selected impedance block output;
- (c) selecting one or more amplifier blocks, each having an input and an output and being selectable such that when selected, the input of the selected amplifier block is connected to the output of the selected impedance block to receive the impedance block processed signal, the selected amplifier block amplifies the impedance block processed signal, and the amplified signal is provided to the selected amplifier block output, wherein the selected amplifier block is selected based at least in part by the envelope of the output signal of the analog signal processor;
- and (d) selecting one or more filter banks, each having an input and an output and being selectable such that when selected, the input of the selected filter bank is connected to the output of the selected amplifier block to receive the amplified signal, the output of the selected filter bank is connected to the output of the analog signal processor, the selected filter bank filters the amplified signal, and the filtered signal is provided to the selected filter bank output.
Dependencies are inferred from the claim text.