Switching circuit for producing an adjustable output characteristic
AssigneeMinebea Co., Ltd.
InventorMarkus Rademacher
Life of this patent
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Abstract
Abstract of the Disclosure The invention relates to a circuit to generate an output characteristic, having a constant voltage control circuit which receives a voltage supply and generates a constant output voltage; a current reduction section, which receives a control voltage and, depending on this, generates a control current which produces a change in the output voltage; and a limiter section which receives a lower and an upper limit voltage and optionally blocks or activates the current reduction section. The invention also relates to a corresponding method to generate an output characteristic.
Claims18
A circuit for generating an adjustable output comprising:
- a constant voltage control circuit (1) which receives a voltage supply (VSUPPLY) and generates a constant output voltage (VOUT);
- a current reduction section (2) which receives a control voltage (VCONTROL) and generates a control current (IC) which produces a change in the output voltage (VOUT);
- and
- a limiter section (3) which receives a lower and an upper limit voltage (VLIMIT1, VLIMIT2) and blocks or activates the current reduction section (2) responsive to the control voltage (VCONTROL).
A method for generating an output characteristic comprising the following steps:
- generating a constant output voltage as a function of a voltage supply and of a reference voltage;
- generating a control current depending on a control voltage and changing the output voltage as a function of the control current;
- and
- activating or blocking the control current depending on whether the control voltage lies within or without an interval between a lower and an upper limit voltage.
Dependencies are inferred from the claim text.