Provided are a latch and a drive method thereof, a source drive circuit and a display device. The latch includes: a first latch circuit and a second latch circuit; the first latch circuit is connected to a first control signal terminal, a data signal terminal and a transmission node, and is configured to latch a data signal from the data signal terminal at a first latch node and transmit the data signal to the transmission node; and the second latch circuit is connected to the transmission node, a first switch signal terminal, a second switch signal terminal and an output node, and is configured to latch a data signal from the transmission node at a second latch node and output the data signal to the output node; a loop in the second latch circuit is turned off in response to the data signal written to the second latch node.

A system and method for efficiently retaining data in sequential elements during power down modes. In various embodiments, a master latch of a flip-flop circuit receives an always-on first power supply voltage, whereas, a slave latch and other surrounding circuitry receives a second power supply voltage capable of being powered down. During a power down mode, circuitry consumes less power while the master latch retains stored data. In some designs, the flip-flop circuit is a level shifting circuit, and the always-on first power supply voltage is less than the second power supply voltage. The master latch uses complex gates with a p-type transistor at the top of a stack of p-type transistors receiving the always-on power supply voltage level on its source terminal and the retained data value on its gate terminal. This top p-type transistor is capable of remaining disabled even when used in a level shifting manner.

A system and method for efficiently retaining data in sequential elements during power down modes. In various embodiments, a master latch of a flip-flop circuit receives an always-on first power supply voltage, whereas, a slave latch and other surrounding circuitry receives a second power supply voltage capable of being powered down. During a power down mode, circuitry consumes less power while the master latch retains stored data. In some designs, the flip-flop circuit is a level shifting circuit, and the always-on first power supply voltage is less than the second power supply voltage. The master latch uses complex gates with a p-type transistor at the top of a stack of p-type transistors receiving the always-on power supply voltage level on its source terminal and the retained data value on its gate terminal. This top p-type transistor is capable of remaining disabled even when used in a level shifting manner.

Various embodiments of the present technology may comprise methods and system for a resettable flip flop. The flip flop may receive a clock signal along a first circuit path and a reset signal along a second circuit path. The first circuit path provides a first high voltage value and a first low voltage value, and the second circuit path provides a second high voltage value that is greater than the first high voltage value and a second low voltage value that is less than the first low voltage value.

A system and method for efficiently retaining data in sequential elements during power down modes. In various embodiments, a master latch of a flip-flop circuit receives an always-on first power supply voltage, whereas, a slave latch and other surrounding circuitry receives a second power supply voltage capable of being powered down. During a power down mode, circuitry consumes less power while the master latch retains stored data. In some designs, the flip-flop circuit is a level shifting circuit, and the always-on first power supply voltage is less than the second power supply voltage. The master latch uses complex gates with a p-type transistor at the top of a stack of p-type transistors receiving the always-on power supply voltage level on its source terminal and the retained data value on its gate terminal. This top p-type transistor is capable of remaining disabled even when used in a level shifting manner.

Provided are a latch and a drive method thereof, a source drive circuit and a display device. The latch includes: a first latch circuit and a second latch circuit; the first latch circuit is connected to a first control signal terminal, a data signal terminal and a transmission node, and is configured to latch a data signal from the data signal terminal at a first latch node and transmit the data signal to the transmission node; and the second latch circuit is connected to the transmission node, a first switch signal terminal, a second switch signal terminal and an output node, and is configured to latch a data signal from the transmission node at a second latch node and output the data signal to the output node; a loop in the second latch circuit is turned off in response to the data signal written to the second latch node.

A pulse triggered flip flop circuit includes an exclusive OR clock generating stage that receives an input clock, data and produces an output clock pulse. The stage produces a output clock pulse that only goes away when the data is fully captured. The stage disables the output clock pulse only when the data is fully captured. Moreover, the circuit only toggles when the input data changes, reducing power consumption in some embodiments.

A pulse triggered flip flop circuit includes an exclusive OR clock generating stage that receives an input clock, data and produces an output clock pulse. The stage produces a output clock pulse that only goes away when the data is fully captured. The stage disables the output clock pulse only when the data is fully captured. Moreover, the circuit only toggles when the input data changes, reducing power consumption in some embodiments.

A pulse triggered flip flop circuit includes an exclusive OR clock generating stage that receives an input clock, data and produces an output clock pulse. The stage produces a output clock pulse that only goes away when the data is fully captured. The stage disables the output clock pulse only when the data is fully captured. Moreover, the circuit only toggles when the input data changes, reducing power consumption in some embodiments.

A pulse triggered flip flop circuit includes an exclusive OR clock generating stage that receives an input clock, data and produces an output clock pulse. The stage produces a output clock pulse that only goes away when the data is fully captured. The stage disables the output clock pulse only when the data is fully captured. Moreover, the circuit only toggles when the input data changes, reducing power consumption in some embodiments.