摘要:
L'invention concerne un multiplexeur logique (7), deux vers un, comportant : deux bornes d'entrée (A, B) ; une borne de sortie (Z) ; une borne de commande (S) ; et un multiple de quatre multiplexeurs unitaires deux vers un (72, 74, 76, 78) raccordés en série, un premier multiplexeur unitaire (72) ayant ses entrées connectées aux bornes d'entrée, un dernier multiplexeur unitaire (78) ayant sa sortie connectée à la borne de sortie et les autres multiplexeurs unitaires (74, 76) ayant leurs entrées respectives interconnectées à la sortie du multiplexeur précédent dans l'association en série, une moitié des multiplexeurs unitaires étant commandée en inverse (75) par rapport à une autre moitié.
摘要:
An output circuit (12) converts a pair of current signals supplied to a pair of common nodes (NCa and NCb) into a pair of voltage signals (VOa and VOb). In each of input buffer circuits (11, 11, ···), a constant current generation section (101) generates, in an output mode, a pair of constant currents in a pair of current paths going from a pair of intermediate nodes (NMa and NMb) to a reference node (VDD1), and stops the generation of the pair of constant currents in a cutoff mode. A voltage-to-current conversion section (102) generates, in the output mode, a pair of input currents corresponding to a pair of input signals (Sa and Sb) in a pair of current paths going from the pair of intermediate nodes (NMa and NMb) to a reference node (GND) to thereby generate a pair of current signals (Ia and Ib) in a pair of current paths going from the pair of intermediate nodes (NMa and NMb) to the pair of common nodes (NCa and NCb), and stops the generation of the pair of input currents in the cutoff mode.
摘要:
An apparatus and method is disclosed for automatic detecting and selecting input audio and video signals, and for providing these input signals over a single output connector and using a single signal line. The selection of the audio and video input signals is realized by a bus identification circuit which can recognize the load of the connected sink devices and can realize switching of the video and audio input signals.
摘要:
A pass-gate (600) has a passageway between an input node (102) and an output node (104). The pass-gate (600) selectively opens or closes the passageway for a signal at the input node under control of a voltage. The pass-gate has a field-effect transistor (106) with a gate electrode (114) and a current channel (110). The current channel (110) is arranged between the input node and the output node. The gate electrode (114) receives the voltage. The pass-gate is configured so as to have the voltage at the control electrode (114) substantially follow the signal at the input node when the passageway is open to the signal.
摘要:
An integrated circuit can be switched between operating modes without the need for a dedicated mode selection pin. A circuit for operation at a specified maximum supply voltage comprises first (DVDD) and second (DVSS) supply- terminals, a first signal input (inputl) for application of a regular input signal, a second signal input (input2), and an output. The circuit further comprises a multiplexer (Mux)with first and second inputs connected to the first and second singnal output. The control circuitry detects a voltage at the first signal input that exceeds the specified maximum supply voltage by a given amount and, in response, applies a drive signal to the input of the gate circuit. With such a circuit design, a relatively high voltage applied to the first signal input will switch the circuit to another operating mode, such as a test mode.
摘要:
Provided is an analog multiplexer with an insulated power supply which does not require a shield surrounding the entire transformers, and is capable of easily collecting analog data with high precision even in the case of high-density arrangement/wiring. The analog multiplexer with an insulated power supply includes: an analog signal transformer for receiving an input of an analog signal in a primary winding thereof via an FET, and performing ON/OFF driving on the FET to generate a pulse with an amplitude of the analog signal in a secondary winding thereof; a drive transformer for receiving an input of a drive pulse in a primary winding thereof via an FET to generate a pulse for turning ON/OFF the FET in a secondary winding thereof; an inhibit generation circuit for generating an inhibit pulse having a pulse width wider than a pulse width of the drive pulse; an AND gate for determining a logical product of a continuous pulse sent from a continuous pulse generation circuit and the inhibit pulse to obtain a power supply pulse train; and a rectifying/smoothing circuit for obtaining a direct current voltage corresponding to the power supply pulse train to apply the direct current voltage to the primary winding of the transformer through high resistance.
摘要:
Disclosed are a high speed serializing-deserializing system and a method thereof. The high speed serializing-deserializing system includes: a serializing unit including a plurality of serializers, generating a strobe signal, and multiplexing and converting N bits of parallel data into serial data; a transmission link transmitting the converted serial data and the strobe signal from the serializing unit; and a deserializing unit including a plurality of deserializers, and converting the serial data from the transmission link into the N bits of parallel data with the strobe signal from the transmission link. When serializing N bits of externally supplied parallel data with a rate of N:1, the N may be set to one of various integers. Although the N is extend to a large number such as 16, 32, and the like, the performance is not deteriorated and serialization-deserialization is possible. Accordingly, a window time per one data may be decreased to reduce a total delay of a serialization, to increase a bandwidth of a link, and to improve the robustness of the serialization-deserialization.