Abstract:
A circuit arrangement for the generation of a bandgap voltage reference in CMOS technology, of the type that includes a circuit module (101; 101') for generation of a base-emitter voltage difference comprising at least one pair of PNP bipolar substrate transistors, which comprises a first bipolar substrate transistor (Q1) inserted in a first circuit branch (B1) that identifies a first current path (11) from the supply voltage (Vdd) to ground (GND), and a second bipolar substrate transistor (Q2) inserted in a second circuit branch (B2) that identifies a second current path (12) from the supply voltage (Vdd) to ground (GND), said first bipolar substrate transistor (Q1) and second bipolar substrate transistor (Q2) being connected together via their base electrode, and the second transistor (Q2) having an aspect ratio (N) higher than that of the first transistor (Q), said circuit arrangement (100; 200; 200'; 200"; 300; 300'; 300"; 400; 400'; 400") comprising a first CMOS current mirror (102; 402; 402') of an n type, connected between said first branch (B1) and said second branch (B2) and connected via a resistance (R1) for adjustment of the bandgap reference voltage to the second bipolar transistor (Q1), a second CMOS current mirror (103; 103'; 403, 403") of a p type, connected between said first branch (B1) and said second branch (B2), said first current mirror (102; 402; 402') and second current mirror (103; 103'; 403, 403") being connected so that each current mirror repeats the current of the other. Said circuit module (101) for generation of a base-emitter voltage difference comprises just said first bipolar substrate transistor (Q1) inserted in the first circuit branch (B1) and said second bipolar substrate transistor (Q2) inserted in the second circuit branch (B2), the current that flows in said circuit arrangement (100; 200; 200'; 200"; 300; 300'; 300"; 400; 400'; 400") from the supply voltage (Vdd) to ground (GND) flowing only through said first bipolar substrate transistor (Q1) and said second bipolar substrate transistor (Q2).
Abstract:
A packaged sensor assembly includes: a packaging structure (2), having at least one opening (18); a humidity sensor (5) and a pressure sensor (10), which are housed inside the packaging structure (2) and communicate fluidically with the outside through the opening (18), and a control circuit (7), operatively coupled to the humidity sensor (5) and to the pressure sensor (10); wherein the humidity sensor (5) and the control circuit (7) are integrated in a first chip (3), and the pressure sensor (10) is integrated in a second chip (8) distinct from the first chip (3) and bonded to the first chip (3).
Abstract:
A circuit arrangement for the generation of a bandgap voltage reference in CMOS technology, of the type that includes a circuit module (101; 101') for generation of a base-emitter voltage difference comprising at least one pair of PNP bipolar substrate transistors, which comprises a first bipolar substrate transistor (Q1) inserted in a first circuit branch (B1) that identifies a first current path (I1) from the supply voltage (Vdd) to ground (GND), and a second bipolar substrate transistor (Q2) inserted in a second circuit branch (B2) that identifies a second current path (12) from the supply voltage (Vdd) to ground (GND), said first bipolar substrate transistor (Q1) and second bipolar substrate transistor (Q2) being connected together via their base electrode, and the second transistor (Q2) having an aspect ratio (N) higher than that of the first transistor (Q), said circuit arrangement (100; 200; 200'; 200"; 300; 300'; 300"; 400; 400'; 400") comprising a first CMOS current mirror (102; 402; 402') of an n type, connected between said first branch (B1) and said second branch (B2) and connected via a resistance (R1) for adjustment of the bandgap reference voltage to the second bipolar transistor (Q1), a second CMOS current mirror (103; 103'; 403, 403") of a p type, connected between said first branch (B1) and said second branch (B2), said first current mirror (102; 402; 402') and second current mirror (103; 103'; 403, 403") being connected so that each current mirror repeats the current of the other. Said circuit module (101) for generation of a base-emitter voltage difference comprises just said first bipolar substrate transistor (Q1) inserted in the first circuit branch (B1) and said second bipolar substrate transistor (Q2) inserted in the second circuit branch (B2), the current that flows in said circuit arrangement (100; 200; 200'; 200"; 300; 300'; 300"; 400; 400'; 400") from the supply voltage (Vdd) to ground (GND) flowing only through said first bipolar substrate transistor (Q1) and said second bipolar substrate transistor (Q2).