Electrical biasing circuit with current limiter
AssigneeGlobalFoundries U.S. Inc.
InventorsVasudeva Reddy Kuppireddy, Venkata Narayana Rao Vanukuru
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Abstract
The disclosure provides an electrical biasing circuit with a current limiter, e.g., for biasing of amplifiers. A structure of the disclosure includes an operational transconductance amplifier (OTA). The OTA includes first input terminal connected to a reference signal output node to receive a reference voltage, a second input terminal connected to a bias signal output node to receive a bias voltage, and an output terminal. A first transistor is connected between a positive supply voltage rail and the bias signal output node. The first control terminal of the first transistor is connected to the output terminal of the OTA.
Claims20
A structure comprising:
- an operational transconductance amplifier (OTA) including:
- a first input terminal connected to a reference signal output node configured to receive a reference voltage,
- a second input terminal connected to a bias signal output node configured to receive a bias voltage, and
- an output terminal;
- and
- a first transistor connected between a positive supply voltage rail and the bias signal output node, wherein a first control terminal of the first transistor is connected to the output terminal of the OTA.
A structure comprising:
- an operational transconductance amplifier (OTA) including:
- a first input terminal connected to a reference signal output node to receive a reference voltage, and
- a second input terminal connected to a bias signal output node to receive a bias voltage, and
- an output terminal;
- a first transistor connected between a positive supply voltage rail and the bias signal output node, wherein a first control terminal of the first transistor is connected to the output terminal of the OTA, and the bias signal output node is connected to an input signal;
- a reference current source and a second transistor connected in series between the positive supply voltage rail and ground, wherein the reference signal output node is at a junction between the reference current source and the second transistor;
- and
- a low noise amplifier (LNA) coupled to the bias signal output node.
A method comprising:
- transmitting a reference voltage to a structure including:
- an operational transconductance amplifier (OTA) including:
- a first input terminal connected to a reference signal output node to receive the reference voltage, and
- a second input terminal connected to a bias signal output node to receive a bias voltage;
- and an output terminal, and
- a first transistor connected between a positive supply voltage rail and the bias signal output node, wherein a first control terminal of the first transistor is connected to the output terminal of the OTA;
- and
- electrically biasing a load coupled to the bias signal output node with the bias voltage.
Dependencies are inferred from the claim text.