Abstract:
The invention relates to a temperature-related voltage generating circuit having an input terminal (15) receiving a control voltage (V BG ) independent of temperature, and an output terminal (16) delivering a temperature-related control voltage (Vout), the input and output terminals (15, 16) being connected together through at least an amplifier stage (19) adapted to set an output reference voltage from a comparison of input voltages, and comprising a generator element (T1) generating a Varying voltage (V BE ) with temperature connected between a ground voltage reference (GND) and a non-inverting input terminal of the amplifier stage (19), which has an output terminal adapted to deliver a multiple of the varying voltage (V BE ) with temperature to an inverting input terminal of a comparator stage (18); the comparator stage (18) has its output connected to the temperature-related voltage generating circuit (14) and a non-inverting input terminal receiving the control voltage (V BG ) independent of temperature to evaluate the difference between the control voltage (V BG ) independent of temperature and said voltage being a multiple of the varying voltage (V BE ) with temperature and to output a temperature-related control voltage (Vout) having at room temperature a mean value which is independent of its thermal differential (δVout/δT) and increases with temperature. The invention also relates to a regulator for a drain voltage (Vd) of a single-supply memory cell (M1), comprising a temperature-related voltage generating circuit (14) according to the invention.
Abstract:
The row decoder includes, for each word line (WL) of the memory (2), a respective biasing circuit (54) receiving at the input a row selection signal (SR ) switching, in preset operating conditions, between a supply voltage (V CC ) and a ground voltage (V GND ) and supplying at the output a biasing signal (R ) for the respective word line (WL) switching between a first operating voltage (V PC ), in turn switching at least between the supply voltage (V CC ) and a programming voltage (V PP ) higher than the supply voltage (V CC ), and a second operating voltage (V NEG ), in turn switching at least between the ground voltage (V GND ) and an erase voltage (V ERN ) lower than the ground voltage (V GND ). Each biasing circuit (54) includes a level translator circuit (58) receiving at the input the row selection signal (SR ) and supplying as output a control signal (CM ) switching between the first and the second operating voltages (V PC , V NEG ) and an output driver circuit (60) receiving as input the control signal (CM ) and supplying at the output the biasing signal (R ).
Abstract:
The switch circuit (40) receives a first supply voltage (V CC ) and a second supply voltage (V PP ) different from each other; a control input (41a) receiving a control signal that may be switched between the first supply voltage and ground; a driving inverter stage (44) supplied by the second supply voltage (V PP ) and defining the output (70) of the circuit; a feedback inverter stage (43) supplied by the second supply voltage and including a top transistor (51) and a bottom transistor (53) defining an intermediate node (58) and having respective control terminals. The control terminal of the top transistor (51) is connected to the output node (70), the control terminal of the bottom transistor (53) is connected to the control input (41a), and the intermediate node is connected to the input (58) of the driving inverter stage. An activation element (80, 71) helps switching of the intermediate node (58) from the second supply voltage to ground; current limiting transistors (52, 62) are arranged in the inverter stages to limit the current flowing during switching and to reduce the consumption of the circuit.