Analog-to-digital converter for supporting analog computation

An analog computer comprising:

• circuitry configured to implement a method, the method comprising:
• receiving in an analog processing domain a first analog input of the sequence;
• generating in the analog processing domain, based on the first analog input, a first analog output;
• quantizing the first analog output, resulting in:
• (i) a first quantized digital output, and
• (ii) a first analog residual error;
• scaling in the analog processing domain the first analog residual error, resulting in a first analog scaled residual error;
• receiving in the analog processing domain a second analog input of the input sequence;
• generating in the analog processing domain, based on the second analog input and the first scaled analog residual error, a second analog output;
• and
• quantizing the second analog output, resulting in a second quantized digital output.

A device comprising:

• an output line;
• an input line coupled to the output line;
• an analog data store coupled to the output line;
• an analog-to-digital converter (ADC) configured to quantize an earlier analog output value on the output line, the earlier analog output value dependent on an earlier analog input value received on the input line, resulting in an earlier quantized digital output, the ADC coupled to the analog data store so as to cause an analog residual error arising from quantizing the earlier analog output value to be stored in the analog data store;
• and
• an error scaling circuit configured to scale the analog residual error, thereby causing a scaled analog residual error to be stored in the analog data store, wherein the ADC is configured to quantize a later analog output value on the output line, resulting in a later quantized digital output, the later analog output value dependent on the scaled analog residual error and a later analog input value received on the input line.