Abstract:
An electronic device comprises an application circuit; a first supply rail having a first electric potential; a second supply rail having a second electric potential different from the first electric potential; at least one terminal having a third electric potential, connected to the application circuit; and a protection circuit for protecting the application circuit from an injected current. The protection circuit comprises a first conductive line connected between the at least one terminal and the first supply rail, the first conductive line comprising a first switch having a first control input; and a first voltage amplifier circuit having a first input connected to the at least one terminal, a second input connected to the second supply rail and a first output connected to the first control input.
Abstract:
AC50017EC-PCT-20090210-Specification.DOC 10 February 2009 - 12 - Freescale Confidential Proprietary Title: Semiconductor device with appraisal circuitry ABSTRACT OF THE DISCLOSURE A semiconductor device (20) comprises a substrate (22) provided with a doping of a first type, on which an electronic circuit (60) is provided surrounded by a circuit portion (62) of the substrate provided with a doping of a second type; at least one pad (30) for connecting the electronic circuit to an external device outside the substrate, surrounded by a pad portion (32) provided with a doping of the second type; a sensing device (50) comprising a sensor portion (52) of the substrate provided with a doping of the first type, for sensing a parameter forming a measure for a local electrical potential of the substrate; and an evaluation unit (24) connected to the sensing device, for providing an evaluation signal based on a difference between the parameter and a reference value. Figure 3
Abstract:
An electronic device (40) comprises an application circuit (42); a first supply rail (44) having a first electric potential; a second supply rail (46) having a second electric potential different from the first electric potential; at least one terminal (48) having a third electric potential, connected to the application circuit; and a protection circuit (50) for protecting the application circuit from an injected current. The protection circuit comprises a first conductive line (52) connected between the at least one terminal and the first supply rail, the first conductive line comprising a first switch (54) having a first control input (56); and a first voltage amplifier circuit (58) having a first input (60) connected to the at least one terminal, a second input (62) connected to the second supply rail and a first output (64) connected to the first control input.
Abstract:
An oscillator circuit (1) for providing an output clock signal (CLK) is described. The oscillator circuit comprising a voltage reference (Vref), a first current source (11), a first capacitor (12), a first capacitor switch (13), a second current source (21), a second capacitor (22), a second capacitor switch (23), a first comparator (15), a second comparator (25) and a flip-flop (30). The first comparator (15) comprises a first chopper-stabilized comparator (150) switchable between a compare phase and a zeroing phase in dependence on the output clock signal and arranged to operate in the compare phase in a first half-phase of the output clock signal to provide a first comparator output (16) from comparing the first capacitor voltage to the reference voltage and arranged to operate in the zeroing phase in the second half-phase. The second comparator (25) comprises a second chopper-stabilized comparator switchable between a respective compare phase and a respective zeroing phase in dependence on the output clock signal and arranged to operate in its compare phase in the second half-phase to obtain a second comparator output (26) from comparing the second capacitor voltage to the reference voltage and arranged to operate in its zeroing phase in the first half-phase.
Abstract:
A clock signal generation system (10) comprises a clock signal generating circuit (12) arranged to provide a first clock signal having a selectable first clock rate; a divider circuit (14) connected to receive the first clock signal and arranged to generate, depending on a division factor, a second clock signal from the first clock signal, having a constant second clock rate and being synchronized with the first clock signal; and a controller module (16) connected to the divider circuit and arranged to change the division factor when a different first clock rate is selected, to keep the second clock rate constant and the second clock signal synchronized with the first clock signal.
Abstract:
A semiconductor device for use in a package comprising an output pin (310) and a reference pin (320) is described. The semiconductor device comprises a plurality of output pads (1 1 1, 1 12) bondable to the output pin (310), a plurality of reference pads (121, 122) bondable to the reference pin (320), and an output driver circuitry (400). The output driver circuitry (400) has a control terminal (400C) for receiving a control signal and arranged to drive the plurality of output pads (111, 112) relative to the plurality of reference pads (121, 122) in dependence on the control signal. The output driver circuitry comprises a plurality of driver sections (401, 402) and a selection circuitry (600). Each driver section is arranged to drive an output pad (111; 112) relative to the single reference pad (121; 122) in dependence on a respective section control signal. The plurality of reference pads (121, 122) is connected in a one-to-one relationship to the plurality of driver sections (401, 402). The plurality of output pads (111, 112) is connected in a one-to-one relationship to the plurality of driver sections (401, 402). The selection circuitry is arranged to provide the respective section control signals to the plurality of driver sections (401, 402) in dependence on at least one selection signal and the control signal. A packaged semiconductor device, a method of testing and a method of conditioning are also described.
Abstract:
A signalling circuit (50) for a signal channel of a communication network comprises a communication network terminal (52) connectable to the signal channel and to a voltage supply (54); an input terminal (56) connectable to receive a transmit signal; a driver device (58) comprising a first driver terminal (60) connected to the communication network terminal, a second driver terminal (62) connected to ground, and a driver control terminal (70) connected to the input terminal; wherein the driver device is arranged to connect the communication network terminal to ground (64) in response to a transition from a low to a high voltage driver control signal state of a driver control signal received at the driver control terminal. And the signalling circuit comprises a feedback circuit (72) connected to the first driver terminal and the driver control terminal and comprising a capacitive device (74); and a pull-down device (76) arranged to connect the driver control terminal to ground (66) after a predefined delay after a transition of the transmit signal from a low to a high voltage transmit signal state.
Abstract:
An oscillator circuit (201) of the type comprising a flip-flop (219) for generating a clock signal (222) and two comparators (213, 216) for comparing a reference voltage with the voltage across a first capacitor which is charged during a first cycle of the clock signal and the voltage across a second capacitor which is charged during a second cycle of a clock signal provides a means for removing the effects of any offset in either comparator. This is achieved by reversing the inputs of the comparators (213, 216) for each cycle of the output frequency. Thus an offset in a comparator which would increase the clock period on one cycle will reduce the period of the next cycle by the same amount (due to the fact that any offset drift tends to evolve slowly compared with the output clock frequency). As a net result, the period of time over two clock periods will stay constant regardless of any offset drift in a comparator.
Abstract:
A semiconductor device includes a substrate (1 ) on which an electronic circuit (40) is provided. Two or more pads may be present which can connect the electronic circuit to an external device outside the substrate. A current meter (50) is electrically in contact with at least a part of the substrate and/or the pad. The meter can measure a parameter forming a measure for an aggregate amount of a current flowing between the substrate and said pads. A control unit (60) is connected to the current meter (50) and the electronic circuit (40), for controlling the electronic circuit based on the measured parameter.