Bandgap voltage reference source
AssigneeKoninklijke Philips Electronics N.V.
InventorZhenhua Wang
Life of this patent
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Abstract
A voltage reference source arrangement (10; 20) is described, comprising: first voltage reference means (2) for providing a first reference voltage (VB) with a first temperature coefficient (α); a plurality (N) of second voltage reference means (3i) for providing compensation reference voltages (VC,i) with second temperature coefficients (βi), the sign of these second temperature coefficients (βi) being opposite to the sign of the first temperature coefficient (α); and means (5i) for adding the first reference voltage (VB) and the compensation reference voltages (VC,i). Thus, the voltage reference source arrangement can be designed with high accuracy.
Claims10
Voltage reference source arrangement (10;
- 20), comprising:
- first voltage reference means (2) for providing a first reference voltage (VB) with a first temperature coefficient (α);
- a plurality (N) of at least two second voltage reference means (3i;
- 39i) for providing compensation reference voltages (VC,i) with second temperature coefficients (βi), the sign of these second temperature coefficients (βi) being opposite to the sign of the first temperature coefficient (α);
- means (5i;
- 30i) for adding the first reference voltage (VB) and the compensation reference voltages (VC,i).
Voltage reference source arrangement according to any of the previous claims, wherein an attenuator is coupled between at least one of said second voltage reference means (3i;
- 30i) and the corresponding adding means (5i;
- 30i).
Dependencies are inferred from the claim text.