摘要:
The invention relates to an electronic device comprising an RF-LDMOS transistor (1) and a protection circuit (2) for the RF-LDMOS transistor. The protection circuit (2) comprises: i) an input terminal (Ni) coupled to a drain terminal (Drn) of the RF-LDMOS transistor (1); ii) a clipping node (Nc); iii) a clipping circuit (3) coupled to the clipping node (Nc) for substantially keeping the voltage on the clipping node (Nc) below a predefined reference voltage, wherein the predefined reference voltage is designed to be larger than the operation voltage on the drain terminal (Drn) and lower than a trigger voltage of a parasitic bipolar transistor that is inherently present in the RF-LDMOS transistor; iv) a capacitance (Ct) coupled between the clipping node (Nc) and a further reference voltage terminal (Gnd), and v) a rectifying element (D1, D2) connected with its anode terminal to the input terminal (Ni) and with its cathode terminal to the clipping node (Nc). The invention provides an RF-LDMOS transistor having an improved RF ruggedness, while not, or at least to a much lesser extent, compromising the RF performance of the RF-LDMOS transistor.
摘要:
Disclosed is a circuit (100) comprising a transistor (110) coupled between a supply voltage line (102) and ground (106), the transistor comprising a control terminal coupled to a input signal line (104), the circuit further comprising first and second bipolar transistors (122, 124) coupled in series between the input signal line (104) and ground (106), wherein the base of the first bipolar transistor is connected to the input signal line and the base of the second bipolar transistor is connected to ground.
摘要:
In this document there is described a Radio Frequency power transistor device (200b, 400b) which comprises (a) a substrate (110), (b) a source contact region (120) formed over the substrate (110), (c) a gate contact region formed (140) over the substrate (110), (d) a drain contact region (130) formed over the substrate (110), (e) a parasitic bipolar transistor (160) given between the substrate (110) and the gate contact region (140), (f) an elongated drain extension region (134) being connected to the drain contact region (130) and extending at least partially towards the parasitic bipolar transistor (160), and (g) an elongated resistor region (270, 470) being arranged between the source contact region (120) and the drain contact region (130). The elongated resistor region (270, 470) extends partially between the source contact region (120) and the drain contact region (130). It is further described a method for forming such a power transistor device (200b, 400b).
摘要:
Disclosed is a circuit (100) comprising a transistor (110) coupled between a supply voltage line (102) and ground (106), the transistor comprising a control terminal coupled to a input signal line (104), the circuit further comprising first and second bipolar transistors (122, 124) coupled in series between the input signal line (104) and ground (106), wherein the base of the first bipolar transistor is connected to the input signal line and the base of the second bipolar transistor is connected to ground.