Abstract:
A data transceiving station of digital data frames comprising a digital modem (MODEM) coupled to a transmission line, a microprocessor (µP) receiving demodulated data from said modem according to a Packet Mode or a Bit Mode transmission through an interface circuit (SERIAL_INTERFACE) that switches from a Packet Mode to a Bit Mode transmission and/or viceversa during transfer of a data frame to said microprocessor conjugating the superior speed of a Packet Mode transfer with the unlimited compatibility of a Bit Mode transfer.
Abstract:
The level of the signal output by a transceiver of digital information coupled to a power distribution line during a transmission phase is regulated by comparing the current level (Iref) of said output signal with a pre-established minimum threshold (IL) and a pre-established maximum threshold (IH); reducing the current level (Iref) when said maximum threshold (IH) is exceeded by reducing the gain; and passing to a voltage mode control of said output signal when the current level (Iref) of the output signal becomes lower than said minimum threshold (IL). The architecture of a coupling interface implementing the above method is illustrated.
Abstract:
Integrated device (202) for use in a monostable circuit (200), the integrated device (202) having a programming terminal (103) able to be linked to external resistive means (Rext) so as to programme the duration of a non-stable state of the circuit (200) and comprising a comparator (120) having a first (+) and a second (-) input terminal and an output terminal for generating an output signal (Vout) of the circuit (200), capacitive means (C) linked to the first input terminal (+) of the comparator (120) so as to apply thereto a voltage (Vc) correlated with the voltage on the capacitive means (C), control means (SW,115) linked to the first input terminal (+) of the comparator (120) so as to switch the circuit (200) to the non-stable state, and means (M1, M2) for sending a current (Iref1) which passes through the resistive means (Rext) to the capacitive means (C), in which the programming terminal (103) is linked to the second input terminal (-) of the comparator (120) so as to apply thereto a voltage (Vref1) correlated with the voltage on the resistive means (Rext).
Abstract:
A circuit for charging a capacitance (C) by means of an LDMOS integrated transistor (LD) functioning as a source follower stage and controlled, in a manner to emulate a high voltage charging diode of the capacitance via a bootstrap (Cp) capacitor charged by a diode (D1) connected to the supply node (Vs) of the circuit, by an (IO1) inverter driven by a logic control circuit in function of a first Low Gate Drive Signal and of a second logic signal (UVLOb) which is active during a phase where the supply voltage (Vs) is lower than the minimum switch-on voltage of the integrated circuit, comprises further a second inverter (M1, M2), functionally referred to the charging node of said bootstrap (Cp) capacitor and to the voltage of the output node (A) of said inverter (IO1) and having an input coupled to said second logic signal (UVLOb) and an output coupled to the gate node of said LDMOS transistor (LD), for preventing accidental undue switch-on of the LDMOS transistor.
Abstract:
An integrated device (105) for a switching system (100) comprises control means (110) for generating at least one switching control signal (Sh), reference means (120) for generating at least one reference quantity (Qref), means (110) for using the reference quantity (Qref), means (130) for storing the reference quantity (Qref), switch means (122) which, in a first operative condition, connect the reference means (120) to the using means (110) and to the storage means (130) in order to apply the reference quantity (Qref) thereto and, in a second operative condition, disconnect the reference means (120) from the using means (110) and connect the storage means (130) to the using means (110) in order to apply the stored reference quantity thereto, and filtering means (135) for keeping the switch means (122) in the second operative condition for a filtering period (Tf) in accordance with the switching of the control signal (Sh).
Abstract:
A circuit is described with which an operation circuit for a discharge lamp can be switched between operation states with different lamp currents by short interruptions of the power supply. Long interruptions than a certain time threshold result in basic state operation.