Analog signal soft switching control with precise current steering generator
AssigneeSTMicroelectronics (Shenzhen) R&D Co. Ltd
InventorsMin Chen, Wen Liu, HongXia Li, XiaoWu Dai
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Abstract
A switching circuit includes a first input stage having an input for receiving a first input signal, an output, and a power terminal for receiving an increasing analog current, a second input stage having an input for receiving a second input signal, an output, and a power terminal for receiving a decreasing analog current, and an output node coupled to the outputs of the first input stage and the second input stage for providing a switched output signal. An output stage is coupled between the first and second input stages and the output node. The first and second input stages are operational amplifiers.
Claims40
A switching circuit comprising:
- a current generator configured to receive a clock signal and generate a charge current and a discharge current, the current generator comprising first and second integrators;
- a voltage generator configured to receive the charge and discharge current and provide a control voltage;
- a voltage-to-current generator configured to receive the control voltage and provide a first analog current and a second analog current;
- and
- an amplifier stage configured to combine the first and second analog currents and provide a switched output signal.
A switching circuit comprising:
- a current generator configured to receive a clock signal and generate a charge current and a discharge current, the current generator comprising first and second current mirrors;
- a voltage generator configured to receive the charge and discharge current and provide a control voltage;
- a voltage-to-current generator configured to receive the control voltage and provide a first analog current and a second analog current;
- and
- an amplifier stage configured to combine the first and second analog currents and provide a switched output signal.
A switching circuit comprising:
- a current generator configured to receive a clock signal and generate a charge current and a discharge current;
- a voltage generator configured to receive the charge and discharge current and provide a control voltage, the voltage generator comprising first and second current mirrors;
- a voltage-to-current generator configured to receive the control voltage and provide a first analog current and a second analog current;
- and
- an amplifier stage configured to combine the first and second analog currents and provide a switched output signal.
A switching circuit comprising:
- a current generator configured to receive a clock signal and generate a charge current and a discharge current;
- a voltage generator configured to receive the charge and discharge current and provide a control voltage, the voltage generator configured to receive two additional clock signals;
- a voltage-to-current generator configured to receive the control voltage and provide a first analog current and a second analog current;
- and
- an amplifier stage configured to combine the first and second analog currents and provide a switched output signal.
A switching circuit comprising:
- a current generator configured to receive a clock signal and generate a charge current and a discharge current;
- a voltage generator configured to receive the charge and discharge current and provide a control voltage;
- a voltage-to-current generator configured to receive the control voltage and provide a first analog current and a second analog current, the voltage-to-current converter comprising first and second current mirrors;
- and
- an amplifier stage configured to combine the first and second analog currents and provide a switched output signal.
Dependencies are inferred from the claim text.