Abstract:
Described herein is a self-supply circuit (30), for a voltage converter (1) that converts an input voltage (V in ) into an output voltage (V out ) and has a main switch (10) and a controller (12), designed to control switching of the main switch (10) for controlling the output voltage (V out ); the self-supply circuit (30) is provided with: a charge accumulator (16), which is connected to the controller (12) and supplies a self-supply voltage (V cc ) to the same controller; a generator (24), which supplies a charge current (I charge ) to the charge accumulator (16); and an auxiliary switch (21), which has a first conduction terminal in common with a respective conduction terminal of the main switch (10) and is operable so as to control transfer of the charge current (I charge ) to the charge accumulator (16). In particular, the self-supply circuit (30) is provided with a precharge stage (31), connected to the auxiliary switch (21), which carries out a precharging of an intrinsic capacitance of the auxiliary switch (21) before a turning-off transient of the main switch (10) ends.
Abstract:
There is described a receiver (4) of a signal communication apparatus; the apparatus comprising a transmitter (1) for transmitting the signals, the receiver (4) for receiving the signals and a galvanically isolated wireless interface (3) interposed between the transmitter and the receiver and comprising a transmitting antenna (L1) and a receiving antenna (L2). The receiver comprises a disturbance rejection circuit (6, 52) coupled to the receiving antenna (L2) and capable of compensating for the parasite currents flowing between the transmitting antenna and the receiving antenna at the potential variations between the input and output of the galvanic isolation interface.
Abstract:
There is described a receiver (4) of a signal communication apparatus; the apparatus comprises a transmitter (1) adapted to transmit coded signals, the receiver (4) for receiving the signal and a wireless interface (3) interposed between the transmitter and the receiver and comprising a transmitting antenna (L1) and a receiving antenna (L2). The receiver comprises decoding means (12) of the received signal and first means (9, 10) coupled to the receiving antenna (L2) and capable of triggering said decoding means of the received signal if the value of the received signal is outside a logical hysteresis consisting of a first logic threshold (TH_LO) having a value smaller than the value of the direct current component of the received signal and a second logic threshold (TH_HI) having a value greater than the value of the direct current component (Irde) of the received signal.
Abstract:
A transmission and reception apparatus for at least one digital data signal (DATA) is described. The digital data signal is characterized by two logical levels, first and second logical levels, with said second logical level higher than the first logical level. The apparatus comprises a transmitter (6, 1), a receiver (3, 7) and a galvanically isolated wireless interface (5) arranged between the transmitter and the receiver and comprising a transmitting antenna and a receiving antenna formed by a pair of coils; said transmitter, receiver and wireless interface are arranged so as to form a two-level isolated digital channel and the transmitter comprises means (6, 1) adapted to send a synchronization signal (CLOCK) to the receiver. The receiver comprises means (7, 71, 72) adapted to synchronize the receiver and the transmitter by means of the received synchronization signal (CLOCK) and the transmitter comprises further means (62, 61) adapted to send said digital data signal (DATA) upon the synchronization of the receiver and transmitter; the means (7, 71, 72) of the receiver comprising at least one memory element (71) configured to memorize, during the reception of said digital data signal (DATA), the information relative to the received synchronization signal (CLOCK). ( Fig. 6 )
Abstract:
Described herein is a device for driving a converter circuit that supplies a charge via a first electronic switch (LS) and a second electronic switch (HS) alternately turned on and off, with a first dead-time interval between turning-off of the first electronic switch and turning-on of the second electronic switch (HS) and a second dead-time interval between turning-off of the second electronic switch (HS) and turning-on of the first electronic switch. Turning-off of the second electronic switch (HS) is controlled as a function of a feedback signal (F) coming from the load (L). The device comprises: - a generator module (11a, C) for generating a memory signal (V c ), indicating the duration of the first dead-time interval; and - a delay module (11b, C, 14, 18, 20), sensitive to said memory signal (V c ) for controlling turning-on of the first electronic switch with a delay, with respect to turning-off of the second electronic switch (HS), identified by the aforesaid memory signal (V C ), so that the second dead-time interval has a duration substantially equal to the duration of the first dead-time interval.
Abstract:
Described herein is a power-supply circuit comprising a transformer (T) having at least one primary winding (T1) and one secondary winding (T2), an electronic switch (204) set on the primary side of the transformer (T) for selectively transferring energy through the primary winding (T1) to the secondary winding (T2), and an energy accumulator (Cout) set on the secondary side of the transformer (T), wherein the energy accumulator (Cout) is charged by means of the energy transferred to the secondary winding (T2). The power-supply circuit further comprises a monitoring circuit (48) configured for monitoring a signal (FB; V out ) on the secondary side of the transformer (T) and generating a feedback signal (R) as a function of the signal monitored (FB; V out ), and a transmission circuit (46) set on the secondary side of the transformer (T) and configured for selectively transferring energy from the energy accumulator (Cout) to the secondary winding (T2) in order to transmit the feedback signal (R). In particular, the transmission circuit (46) comprises: a) an electronic switch having a control terminal that drives switching of the switch; and b) a driver circuit for driving the electronic switch, wherein the driver circuit comprises a charge-accumulation capacitor connected to the control terminal of the switch, and a charge circuit configured for drawing energy from the secondary winding (T2) and charging the charge-accumulation capacitor by means of the energy drawn off.
Abstract:
Described herein is a power-supply circuit comprising a transformer (T) having at least one primary winding (T1) and one secondary winding (T2), an electronic switch (204) set on the primary side of the transformer (T) for selectively transferring energy through the primary winding (T1) to the secondary winding (T2), and an energy accumulator (Cout) set on the secondary side of the transformer (T), wherein the energy accumulator (Cout) is charged by means of the energy transferred to the secondary winding (T2). The power-supply circuit further comprises a monitoring circuit (48) configured for monitoring a signal (FB; V out ) on the secondary side of the transformer (T) and generating a feedback signal (R) as a function of the signal monitored (FB; V out ), and a transmission circuit (46) set on the secondary side of the transformer (T) and configured for selectively transferring energy from the energy accumulator (Cout) to the secondary winding (T2) in order to transmit the feedback signal (R). In particular, the transmission circuit (46) comprises: a) an electronic switch having a control terminal that drives switching of the switch; and b) a driver circuit for driving the electronic switch, wherein the driver circuit comprises a charge-accumulation capacitor connected to the control terminal of the switch, and a charge circuit configured for drawing energy from the secondary winding (T2) and charging the charge-accumulation capacitor by means of the energy drawn off.
Abstract translation:这里描述了一种电源电路,其包括具有至少一个初级绕组(T1)和一个次级绕组(T2)的变压器(T),设置在变压器(T)的初级侧上的电子开关(204),用于选择性地 将能量通过初级绕组(T1)传递到次级绕组(T2),以及设置在变压器(T)的次级侧上的蓄能器(Cout),其中通过能量对蓄能器(Cout)进行充电 转移到次级绕组(T2)。 电源电路还包括监视电路(48),其被配置用于监视变压器(T)的次级侧上的信号(FB; V out),并产生作为所监视信号的函数的反馈信号(R) FB; V out)以及设置在变压器(T)的次级侧上并被配置为选择性地将能量从能量累加器(Cout)传递到次级绕组(T2)的传输电路(46),以便传输反馈 信号(R)。 特别地,传输电路(46)包括:a)具有驱动开关切换的控制端子的电子开关; 以及b)用于驱动所述电子开关的驱动电路,其中所述驱动电路包括连接到所述开关的控制端子的电荷蓄积电容器和被配置为从所述次级绕组(T2)吸取能量并对所述电荷充电的充电电路 - 累积电容器通过所消耗的能量。
Abstract:
There is described a signal communication apparatus comprising first (51) and second (52) channels for communicating signals between two electronic devices (10, 4); each of said first and second channels comprises a transmitter (1, 21, 22) for transmitting signals, a receiver (3, 24, 25) for receiving signals and an interface (23) arranged between the transmitter and the receiver. The transmitter comprises first means (21, 22) adapted to code the signals in the form of a frame of H bits (F), with H being an integer, and adapted to serially transmit said frame of H bits through said interface, and the receiver comprises a decoder (25) for decoding said frame of H bits, said frame of H bits comprising P data bits (DATA), K redundancy bits and a sequence of L control bits adapted to identify the type of frame to be transmitted, with L, P and K being integers.