Abstract: An analog-to-digital converter has a resistor string that generates a series of voltages. An upper selector selects voltages at the upper end of the series. A lower selector selects voltages at the lower end of the series. A pair of midrange selectors select a pair of adjacent voltages in the middle range of the series. A midrange voltage generator generates further voltages spaced between the two selected midrange voltages. An output selector selects one of the further voltages. The selectors are controlled by various bits of a digital input signal. The voltage selected by the upper selector, lower selector, or output selector becomes an analog output signal. This analog-to-digital converter has comparatively few resistors and transistors and can generate accurate voltages for driving a gray-scale display.

Abstract: A digital-to-analog converter generates a monotonic sequence of reference voltages and selects an arbitrary pair of reference voltages, adjacent in the monotonic sequence. One of the selected reference voltages is supplied through a resistor and a switching device, connected in series, to the output terminal of the converter. The other selected reference voltage is supplied through another resistor and another switching device, connected in series, to the same output terminal. This arrangement saves space, and enables variations in the output voltage levels to-be kept within tolerance by use of resistors with sufficiently high resistance values.

Abstract: An analog-to-digital converter has a resistor string that generates a series of voltages. An upper selector selects voltages at the upper end of the series. A lower selector selects voltages at the lower end of the series. A pair of midrange selectors select a pair of adjacent voltages in the middle range of the series. A midrange voltage generator generates further voltages spaced between the two selected midrange voltages. An output selector selects one of the further voltages. The selectors are controlled by various bits of a digital input signal. The voltage selected by the upper selector, lower selector, or output selector becomes an analog output signal. This analog-to-digital converter has comparatively few resistors and transistors and can generate accurate voltages for driving a gray-scale display.

Abstract: An analog-to-digital converter has a resistor string that generates a series of voltages that are equally spaced in the middle range of the series and unequally spaced at the upper and lower ends. An upper selector selects voltages at the upper end. A lower selector selects voltages at the lower end. A pair of midrange selectors select a pair of adjacent voltages in the middle range. A midrange voltage generator generates further voltages equally spaced between the two selected midrange voltages. An output selector selects one of the further voltages. The selectors are controlled by various bits of a digital input signal. The voltage selected by the upper selector, lower selector, or output selector becomes an analog output signal. This analog-to-digital converter has comparatively few resistors and transistors and can generate accurate voltages for driving a gray-scale display.

Abstract: A digital-to-analog converter generates a monotonic sequence of reference voltages and selects an arbitrary pair of reference voltages, adjacent in the monotonic sequence. One of the selected reference voltages is supplied through a resistor and a switching device, connected in series, to the output terminal of the converter. The other selected reference voltage is supplied through another resistor and another switching device, connected in series,.to the same output terminal. This arrangement saves space, and enables variations in the output voltage levels to-be kept within tolerance by use of resistors with sufficiently high resistance values.

Abstract: A digital-to-analog converter generates a monotonic sequence of reference voltages and selects an arbitrary pair of reference voltages, adjacent in the monotonic sequence. One of the selected reference voltages is supplied through a resistor and a switching device, connected in series, to the output terminal of the converter. The other selected reference voltage is supplied through another resistor and another switching device, connected in series, to the same output terminal. This arrangement saves space, and enables variations in the output voltage levels to be kept within tolerance by use of resistors with sufficiently high resistance values.

Abstract: An analog-to-digital converter has a resistor string that generates a series of voltages that are equally spaced in the middle range of the series and unequally spaced at the upper and lower ends. An upper selector selects voltages at the upper end. A lower selector selects voltages at the lower end. A pair of midrange selectors select a pair of adjacent voltages in the middle range. A midrange voltage generator generates further voltages equally spaced between the two selected midrange voltages. An output selector selects one of the further voltages. The selectors are controlled by various bits of a digital input signal. The voltage selected by the upper selector, lower selector, or output selector becomes an analog output signal. This analog-to-digital converter has comparatively few resistors and transistors and can generate accurate voltages for driving a gray-scale display.

Abstract: A digital-to-analog converter generates a monotonic sequence of reference voltages and selects an arbitrary pair of reference voltages, adjacent in the monotonic sequence, according to digital input. A switching network charges a capacitor according to the difference between the two selected reference voltages, then connects another capacitor to the first capacitor to generate a voltage intermediate between the two selected reference voltages by redistributing charge between the capacitors. The switching network also selects one of the selected reference voltages or the intermediate voltage as the analog output voltage. This conversion scheme saves space with little or no increase in current consumption.

Abstract: A digital-to-analog converter generates a monotonic sequence of reference voltages and selects an arbitrary pair of reference voltages, adjacent in the monotonic sequence. One of the selected reference voltages is supplied through a resistor and a switching device, connected in series, to the output terminal of the converter. The other selected reference voltage is supplied through another resistor and another switching device, connected in series, to the same output terminal This arrangement saves space, and enables variations in the output voltage levels to be kept within tolerance by use of resistors with sufficiently high resistance values.

Abstract: A digital-to-analog converter generates a monotonic sequence of reference voltages and selects an arbitrary pair of reference voltages, adjacent in the monotonic sequence. One of the selected reference voltages is supplied through a resistor and a switching device, connected in series, to the output terminal of the converter. The other selected reference voltage is supplied through another resistor and another switching device, connected in series, to the same output terminal. This arrangement saves space, and enables variations in the output voltage levels to be kept within tolerance by use of resistors with sufficiently high resistance values.

Abstract: A digital-to-analog converter generates a monotonic sequence of reference voltages and selects an arbitrary pair of reference voltages, adjacent in the monotonic sequence. One of the selected reference voltages is supplied through a resistor and a switching device, connected in series, to the output terminal of the converter. The other selected reference voltage is supplied through another resistor and another switching device, connected in series, to the same output terminal. This arrangement saves space, and enables variations in the output voltage levels to be kept within tolerance by use of resistors with sufficiently high resistance values.

Abstract: A digital-to-analog converter generates a monotonic sequence of reference voltages and selects an arbitrary pair of reference voltages, adjacent in the monotonic sequence, according to digital input. A switching network charges a capacitor according to the difference between the two selected reference voltages, then connects another capacitor to the first capacitor to generate a voltage intermediate between the two selected reference voltages by redistributing charge between the capacitors. The switching network also selects one of the selected reference voltages or the intermediate voltage as the analog output voltage. This conversion scheme saves space with little or no increase in current consumption.