Abstract:
This invention relates to a high voltage regulator partly supplied by a boosted voltage (PUMPOUT) and adapted to deliver a regulated output voltage (Vout) on an output terminal (OUT), starting from a sampled voltage (Vsample) obtained by dividing the regulated output voltage (Vout), which regulator comprises at least a comparator element (2) being supplied a supply voltage (Vdd) and feedback connected to a divider (4) of the regulated output voltage (Vout), the divider (4) being a diode type of divider connected between the output terminal (OUT) and a first comparison voltage reference (GND, Vref_v) and having a central connection node (Y, Z) connected to a non-inverting terminal of the comparator element (2). The invention also relates to a method of regulating a voltage (Vout) derived from a boosted voltage (PUMPOUT), comprising the steps of:
obtaining a sampled voltage (Vsample) as the voltage value at a central connection node (Y, Z) of a diode type of divider (4) connected to a reference of the voltage to be regulated (Vout) and connected to a first comparison voltage reference (GND, Vref_v); regulating this voltage (Vout) according to the comparison of said sampled voltage (Vsample) with a second comparison voltage reference (Vref_v, GND).
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.