Abstract: A non-volatile memory, such as a one-time programmable memory, with a dual purpose read/write cache. The read/write cache is used as a write cache during programming, and stores the data to be written for a full row of the memory array. The programming operation simultaneously programs all cells in the selected row based on the contents of the write cache. In subsequent read operations, the read/write cache is used as a read cache. A full row of the array is simultaneously read in a read access, and the contents of that row are stored in the read cache. Subsequent access to that same row causes the data to be read from the read cache rather than requiring access of the array.

Abstract: A non-volatile memory, such as a one-time programmable memory, with a dual purpose read/write cache. The read/write cache is used as a write cache during programming, and stores the data to be written for a full row of the memory array. The programming operation simultaneously programs all cells in the selected row based on the contents of the write cache. In subsequent read operations, the read/write cache is used as a read cache. A full row of the array is simultaneously read in a read access, and the contents of that row are stored in the read cache. Subsequent access to that same row causes the data to be read from the read cache rather than requiring access of the array.

Abstract: A hybrid FIR/IIR analog filter for filtering the coarsely quantized output of a sigma-delta modulator for digital-to-analog conversion. The functions of an FIR and IIR filter are combined into one circuit to gain the benefits of both, while requiring fewer taps than the present FIR approach, and requiring less area as an IIR filter.

Abstract: A three-level digital-to-analog (D/A) converter receives digital signals, derives three-level control signals and generates analog signals. The three-level D/A converter comprises a control device for converting incoming digital signals to control signals having three levels, switches for switching responsive to these three levels to control a network of switches, and a load responsive to these switches to generate corresponding analog signals. The control device comprises a feedback control loop and a quantizer to produce the control signals having High, Medium and Low levels. The switches are preferably four switches that open and close cooperatively in response to the High, Medium and Low levels. The load generates a positive, zero or negative voltage reference in the analog signals in response to the operation of the four switches.