Analog voltage output circuit
AssigneeSGS-Thomson Microelectronics S.A.
InventorSylvie Drouot
Life of this patent
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Abstract
The disclosure relates to an integrated circuit including an internal supply circuit. In the disclosed circuit, an analog voltage output circuit enables the connection of an output of this internal supply circuit to a connection pin of the integrated circuit. It is thus possible to make measurements, without difficulty, of the value of the internal voltage produced. The analog voltage output circuit is arranged in such a way that it is possible, firstly, to enforce a voltage from outside on the output of the internal supply circuit and, secondly, to insulate the output of the internal supply circuit from the connection pin.
Claims13
An integrated circuit comprising:
- reference terminals to respectively give at least one basic voltage and at least one supply voltage,
- an internal supply circuit comprising at least one internal input terminal to receive a supply voltage, at least one internal output terminal to deliver an internal supply voltage, and at least one control terminal to receive an on/off pulse signal,
- a test terminal being capable of receiving and giving a test voltage,
- a test control terminal being capable of receiving a test control signal,
- an analog voltage output circuit connected respectively to the internal output terminal, the test terminal, the test control terminal, at least one reference terminal, the analog voltage output circuit including insulation transistors series-connected between the internal output terminal and the test terminal and at least one switching circuit,
- wherein a first switching circuit connects the control gate of a first insulation transistor to the test terminal when the test control signal is in a first state, and to a reference terminal when the test control signal is in a second state.
Dependencies are inferred from the claim text.