摘要:
Afrequency divider circuit and a frequency synthesizer circuit are presented, comprising: first and second flip-flops; a phase inverter, wherein an output electrode of the first flip-flop is connected to an input electrode of the second flip-flop and an output electrode of the phase inverter, an output electrode of the second flip-flop is connected to an input electrode of the phase inverter and an input electrode of the first flip-flop, a control electrode of the phase inverter is connected to a control signal; and a control module, wherein the first flip-flop is connected to a voltage source through the control module, the control module is connected to the control signal and controls the connection between the first flip-flop and the voltage source. When the control signal is a first-mode signal, the first flip-flop is disconnected from the voltage source, providing a functionality of a N-division frequency divider. When both the control signal and an output signal of the second flip-flop are a second-mode signal, a functionality of a N+1-division frequency divider is provided.
摘要:
A circuit and an array circuit for implementing a shift operation are provided. The circuit for implementing a shift operation includes a resistive random-access memory and four switches, where a first switch is closed when a first end of the first switch is at a low level, a fourth switch is closed when a first end of the fourth switch is at a low level, a second switch is closed when a first end of the second switch is at a high level, and a third switch is closed when a first end of the third switch is at a high level; a second end of the first switch and a second end of the third switch are connected to a negative input end of the resistive random-access memory; a second end of the second switch and a second end of the fourth switch are connected to a positive input end of the resistive random-access memory; the first end of the first switch, the first end of the second switch, the first end of the third switch, and the first end of the fourth switch are connected to an output end of a previous-stage circuit for implementing a shift operation; a third end of the first switch and a third end of the second switch are connected to a bias voltage end; and a third end of the third switch and a third end of the fourth switch are connected to a ground end. The shift circuit has a simple structure and can improve computational efficiency.
摘要:
A latch circuit which can control a drain avalanche effect and improve reliability is provided. The latch circuit includes an input transistor (NMT1) importing a voltage corresponding to"0" or "1" when the scanning voltage (φG) is input to a gate, a storage capacitance (CD) storing a voltage imported by the input transistor (NMT1), and having a first electrode and a second electrode, the first electrode is input with a capacitance control signal (φW) and the second electrode is connected to a second electrode (N1) of the input transistor (NMT1), a first conduction type first transistor (NMT2) having a gate connected to the second electrode (N1) of the input transistor (NMT1), a second electrode (N2) connected to a first output terminal (OUT1), and a first electrode input with a first latch control signal (φAC1), and a second conduction type second transistor (PMT3) having a gate connected to the second electrode (N2) of the first transistor (NMT2), a second electrode (N3) connected to a second output terminal (OUT2), and a first electrode input with a second latch control signal (φAC2).
摘要:
A level shifter (400) and method are provided for balancing rise and fall times of a signal. An input circuit (420, 413) receives a differential logic signal (Inp, Inn) with two complimentary logic levels. A level transition balancing circuit (420) balances the rise and fall times of a level shifted version of each complimentary logic level during a transition from a first to a second of the logic levels and a level shift. A logic element (430) stores and provides outputs (outp, ounn) of the level shifted versions of the logic levels. The level transition balancing circuit (420) includes a capacitor (421) in parallel with a field-effect transistor (422) for each input. The capacitor destabilizes inputs to the logic element and balances the transition using the capacitance and a level (435, 436) previously stored in the logic element.
摘要:
A level shifter includes an inverting circuit, a cross-coupled level shifting latch, and a SR logic gate latch. The first and second outputs of the level shifting latch are coupled to the set (S) and reset (R) inputs of the SR latch. The inverting circuit, that is powered by a first supply voltage VDDL, supplies a noninverted version of an input signal onto a first input of the level shifting latch and supplies an inverted version of the input signal onto a second input of the level shifting latch. A low-to-high transition of the input signal resets the SR latch, whereas a high-to-low transition sets the SR latch. Duty cycle distortion skew of the level shifter is less than fifty picoseconds over voltage, process and temperature corners, and the level shifter has a supply voltage margin of more than one quarter of a nominal value of VDDL.
摘要:
A level shifter (100) includes an inverting circuit (104), a cross-coupled level shifting latch (102), and a SR logic gate latch (103). The first and second outputs of the level shifting latch are coupled to the set (S) and reset (R) inputs of the SR latch. The inverting circuit, that is powered by a first supply voltage VDDL, supplies a noninverted version of an input signal (IND) onto a first input of the level shifting latch (112) and supplies an inverted version of the input signal (INB) onto a second input of the level shifting latch (113). A low-to-high transition of the input signal resets the SR latch, whereas a high-to-low transition sets the SR latch. Duty cycle distortion skew of the level shifter is less than fifty picoseconds over voltage, process and temperature corners, and the level shifter has a supply voltage margin of more than one quarter of a nominal value of VDDL.
摘要:
A semiconductor device by which chip size increase is suppressed even the number of bits is increased. In a high withstand voltage digital/analog converter (1), a voltage generated between a potential (VH) and a potential (VL) is divided, and one of a plurality of potentials (3-9) generated by the division based on input signals (D0 to DN-1) can be outputted. The high withstand voltage digital/analog converter is provided with a plurality of element groups (11, 13); an output element group (15); and a level shifting section (17) which shifts the level of the potential of the input signal to a potential required for operating each of the output element group (15) and element groups (11, 13) and applies the potential. The potentials (3-9) are classified into a plurality of groups by potential level order, a voltage between group potentials, which correspond by being provided for each group, is applied to each of element groups (11, 13), and each element group operate, and based on the input signal, the element group outputs one of the potentials in the corresponding group. A voltage between the potential (VH) and the potential (VL) is applied to the output element group (15), and the output element group operates, and based on the input signal, the output element group outputs one of the potentials which can be outputted by the element groups (11, 13).