Voltage reference source and method for generating a reference voltage

A method for generating a reference voltage, comprising:

• providing a first signal at a first terminal of a source block, wherein the first terminal of the source block is coupled to a first terminal of a first resistor;
• providing a second signal implemented as a current at a second terminal of the source block;
• mirroring the second signal into a mirror current by a first current mirror comprising a first and a second mirror transistor such that the first mirror transistor couples the second terminal of the source block to a supply voltage terminal and the second mirror transistor couples a reference output to the supply voltage terminal;
• providing the mirror current via a series connection of a second resistor and a diode to the first terminal of the first resistor;
• and
• providing the reference voltage at the reference output,
• wherein the source block comprises
• a third terminal that is coupled to a reference potential terminal,
• a fourth terminal that is coupled to the supply voltage terminal, and
• a first and a second transistor that are cross coupled by a connection of a first terminal of the first transistor to a control terminal of the second transistor and a connection of a first terminal of the second transistor to a control terminal of the first transistor, and
• wherein the first transistor is arranged between the first terminal of the source block and the second terminal of the source block and the second transistor is arranged between the third terminal of the source block and the fourth terminal of the source block.

A voltage reference source, comprising:

• a source block;
• a first resistor having a first terminal coupled to a first terminal of the source block;
• a reference output for providing a reference voltage;
• a first and a second mirror transistor forming a first current mirror, wherein the first mirror transistor couples a second terminal of the source block to a supply voltage terminal and the second mirror transistor couples the reference output to the supply voltage terminal;
• a series connection of a second resistor and a diode that is arranged between the reference output and the first terminal of the first resistor such that a mirror current flows through the second mirror transistor and the series connection to the first terminal of the first resistor;
• and a current source which comprises a source resistor, wherein the source block comprises a third terminal that is directly coupled to a reference potential terminal and a fourth terminal that is coupled to the supply voltage terminal via the current source, and wherein a second terminal of the first resistor is directly connected to the reference potential terminal.