Method of forming a semiconductor device and circuit
AssigneeSemiconductor Components Industries, LLC
InventorMartin Podzemny
Life of this patent
Estimating the term…
Abstract
A voltage regulator circuit may include a first loop that forms a reference signal that substantially does not vary in response to the output voltage, the reference circuit may also be configured to form a control signal that is representative of changes in the reference signal. The voltage regulator circuit may also include a second loop configured to form a value of a control electrode of an output transistor according to the control signal and wherein the output circuit is configured to change a value of the control electrode according to a difference between the output voltage and the reference signal.
Claims15
A voltage circuit to form an output voltage for a load, the voltage circuit comprising:
- a control circuit configured to form a reference voltage wherein the control circuit does not receive a signal that is representative of either of the output voltage or an output current supplied to the load by the voltage circuit;
- an output transistor that conducts the output current and forms the output voltage;
- a transconductance amplifier that forms an output signal that varies in response to a difference between the output voltage and the reference voltage;
- and
- an output circuit having a resistor coupled in series between the control circuit and the output transistor to form a first voltage for a gate voltage for the output transistor, wherein the resistor also receives the output signal and changes the first voltage according to the output signal.
A semiconductor device having a regulator circuit for forming an output voltage, the regulator circuit comprising:
- a reference circuit configured to form a reference signal that substantially does not vary in response to the output voltage, the reference circuit including an operational amplifier configured to form a control signal that is representative of changes in the reference signal, the reference circuit including a transistor wherein the reference circuit controls a gate voltage of the transistor according to the control signal;
- an output transistor configured to conduct an output current to a load and to control the output voltage;
- and
- an output circuit configured to form an adjust signal that is representative of a difference between the output voltage and the reference signal, the output circuit configured to form a value of a control electrode of the output transistor responsively to the control signal and the adjust signal.
A semiconductor device having a regulator circuit for forming an output voltage, the regulator circuit comprising:
- a reference circuit configured to form a reference signal that substantially does not vary in response to the output voltage, the reference circuit also configured to form a control signal that is representative of changes in the reference signal wherein the control signal substantially does not vary in response to the output voltage;
- and
- an output circuit configured to form an adjust signal that is representative of a difference between the output voltage and the reference signal, the output circuit configured change a value of the control signal according to a value of the adjust signal, the output circuit configured to control the output voltage responsively to the value of the control signal.
Dependencies are inferred from the claim text.