A multiplexer comprises: an output circuit comprising a multiplexer output; and a first buffer coupled to the output circuit and comprising: a first selection input configured to receive a first selection signal; a first logical input configured to receive a first logical input signal; and a first ground; wherein the multiplexer is configured to: couple the first logical input to the multiplexer output when the first selection signal is a first value; and couple the first logical input to the first ground when the first selection signal is a second value. A method comprises: receiving a selection signal and a first logical input signal; coupling a first logical input to a multiplexer output when the selection signal is a first value; and coupling the first logical input to a ground when the selection signal is a second value.

The disclosure relates to a latch including a first inverter with a first pair of field effect transistors (FETs) configured with a first channel width to length ratio (W/L), and a second inverter with a second pair of FETs configured with a second W/L different than the first W/L. Another latch includes first and second inverters; a first negative feedback circuit including first and second FETs coupled between first and second voltage rails, the input of the first inverter coupled between the first and second FETs, and the first and second FETs including gates coupled to an output of the first inverter; and a second negative feedback circuit including third and fourth FETs coupled between the first and second voltage rails, the input of the second inverter coupled between the third and fourth FETs, and the third and fourth FETs including gates coupled to an output of the second inverter.

This disclosure relates to the technical field of automobiles and discloses an automobile key programmer applied to an automobile diagnostic instrument, wherein the automobile key programmer includes an activation coil, a first changeover switch, a second changeover switch, an infrared modulation circuit, an amplitude shift keying modulation circuit, and a frequency shift keying modulation circuit; when the first changeover switch is not powered on, the infrared modulation circuit provides a resonant voltage for the activation coil; when the first changeover switch is powered on and the second changeover switch is not powered on, the amplitude shift keying modulation circuit provides a resonant voltage for the activation coil; when both the first changeover switch and the second changeover switch are powered on, the frequency shift keying modulation circuit provides a resonant voltage for the activation coil; only one coil is required in the automobile key programmer to change voltages.

The disclosure relates to a latch including a first inverter with a first pair of field effect transistors (FETs) configured with a first channel width to length ratio (W/L), and a second inverter with a second pair of FETs configured with a second W/L different than the first W/L. Another latch includes first and second inverters; a first negative feedback circuit including first and second FETs coupled between first and second voltage rails, the input of the first inverter coupled between the first and second FETs, and the first and second FETs including gates coupled to an output of the first inverter; and a second negative feedback circuit including third and fourth FETs coupled between the first and second voltage rails, the input of the second inverter coupled between the third and fourth FETs, and the third and fourth FETs including gates coupled to an output of the second inverter.

A switch circuit and a high-speed multiplexer-demultiplexer are provided. The switch circuit includes an equalization module and an MOS transistor. A gate of the first MOS transistor is connected to an output terminal of the equalization module. An input terminal of the first MOS transistor is connected to a signal source. An output terminal of the first MOS transistor is connected to a subsequent circuit. The equalization module is configured to: supply a turning-on signal to the first MOS transistor in a case that an operation signal is acquired, to turn on the first MOS transistor; and generate a compensation signal for compensating an attenuation of the signal transmitted through the first MOS transistor, and apply the compensation signal to the gate of the first MOS transistor. The switch circuit operates in response to the operation signal.

A semiconductor device including a first semiconductor chip, a second semiconductor chip, the junction temperature of which becomes higher than that of the first semiconductor chip during switching of the semiconductor device, a collector pattern electrically connected to a collector of the first semiconductor chip and a collector of the second semiconductor chip, an emitter pattern electrically connected to an emitter of the first semiconductor chip and an emitter of the second semiconductor chip, a gate pattern electrically connected to a gate of the first semiconductor chip, a first diode having an anode electrically connected to the gate pattern and a cathode electrically connected to a gate of the second semiconductor chip and a second diode connected in reverse parallel with the first diode.

A semiconductor device including a first semiconductor chip, a second semiconductor chip, the junction temperature of which becomes higher than that of the first semiconductor chip during switching of the semiconductor device, a collector pattern electrically connected to a collector of the first semiconductor chip and a collector of the second semiconductor chip, an emitter pattern electrically connected to an emitter of the first semiconductor chip and an emitter of the second semiconductor chip, a gate pattern electrically connected to a gate of the first semiconductor chip, a first diode having an anode electrically connected to the gate pattern and a cathode electrically connected to a gate of the second semiconductor chip and a second diode connected in reverse parallel with the first diode.

A switch circuit and a high-speed multiplexer-demultiplexer are provided. The switch circuit includes an equalization module and an MOS transistor. A gate of the first MOS transistor is connected to an output terminal of the equalization module. An input terminal of the first MOS transistor is connected to a signal source. An output terminal of the first MOS transistor is connected to a subsequent circuit. The equalization module is configured to: supply a turning-on signal to the first MOS transistor in a case that an operation signal is acquired, to turn on the first MOS transistor; and generate a compensation signal for compensating an attenuation of the signal transmitted through the first MOS transistor, and apply the compensation signal to the gate of the first MOS transistor. The switch circuit operates in response to the operation signal.

This disclosure relates to the technical field of automobiles and discloses an automobile key programmer applied to an automobile diagnostic instrument, wherein the automobile key programmer includes an activation coil, a first changeover switch, a second changeover switch, an infrared modulation circuit, an amplitude shift keying modulation circuit, and a frequency shift keying modulation circuit; when the first changeover switch is not powered on, the infrared modulation circuit provides a resonant voltage for the activation coil; when the first changeover switch is powered on and the second changeover switch is not powered on, the amplitude shift keying modulation circuit provides a resonant voltage for the activation coil; when both the first changeover switch and the second changeover switch are powered on, the frequency shift keying modulation circuit provides a resonant voltage for the activation coil; only one coil is required in the automobile key programmer to change voltages.

A multiplexer comprises: an output circuit comprising a multiplexer output; and a first buffer coupled to the output circuit and comprising: a first selection input configured to receive a first selection signal; a first logical input configured to receive a first logical input signal; and a first ground; wherein the multiplexer is configured to: couple the first logical input to the multiplexer output when the first selection signal is a first value; and couple the first logical input to the first ground when the first selection signal is a second value. A method comprises: receiving a selection signal and a first logical input signal; coupling a first logical input to a multiplexer output when the selection signal is a first value; and coupling the first logical input to a ground when the selection signal is a second value.