Detector with complementary response slope
AssigneeAnalog Devices, Inc.
InventorBarrie Gilbert
Life of this patent
Estimating the term…
Abstract
A measurement signal from a detector may have a complementary polarity. For example, an RF power detector may generate an output signal that decreases in magnitude in response to an increasing input signal. In one embodiment, the RF power detector may include a series of transconductance detector cells arranged to progressively turn off as the input signal becomes progressively larger.
Claims20
A system comprising:
- a detector to generate a measurement signal responsive to an input signal;
- and
- a nulling circuit coupled to the detector to generate a control signal responsive to the difference between the measurement signal and a set-point signal;
- wherein the nulling circuit comprises a bandwidth compensation stage to maintain the overall control loop bandwidth at a substantially constant value.
A system comprising:
- a detector to generate a measurement signal responsive to an input signal;
- and
- a nulling circuit coupled to the detector to generate a control signal responsive to the difference between the measurement signal and a set-point signal;
- wherein the nulling circuit has a bandwidth that can be varied responsive to a bandwidth compensation signal to maintain the overall control loop bandwidth at a substantially constant value.
A system comprising:
- a detector to generate a measurement signal responsive to an input signal;
- and
- a nulling circuit coupled to the detector to generate a control signal responsive to the difference between the measurement signal and a set-point signal;
- wherein the nulling circuit comprises a forward gain path having an error generator and an integrator;
- and
- wherein the forward gain path comprises a bandwidth compensation cell ahead of the integrator to maintain the overall control loop bandwidth at a substantially constant value.
A system comprising:
- a detector to generate a measurement signal responsive to an input signal;
- and
- a nulling circuit coupled to the detector to generate a control signal responsive to the difference between the measurement signal and a set-point signal, wherein the nulling circuit comprises a forward gain path having an error generator and an integrator;
- wherein the forward gain path comprises a bandwidth compensation cell ahead of the integrator.
A method comprising:
- generating a measurement signal responsive to an input signal;
- generating an error signal responsive to the difference between the measurement signal and a set-point signal;
- generating a control signal by integrating the error signal;
- and
- gain correcting the error signal prior to integrating the error signal.
A method for controlling a system having a forward path including a detector, an error generator to receive a measured signal from the detector and a set-point signal, and an integrator, the method comprising varying the gain of the forward path prior to the integrator.
A method for controlling a system having a forward path including a detector, an error generator to receive a measured signal from the detector and a set-point signal, and an integrator, the method comprising varying the bandwidth of the forward path.
Dependencies are inferred from the claim text.