Abstract: An improved system and method of determining the linearity of a ramp signal, including a ramp generator (11) for generating a ramp signal and a vernier delay (15) to provide scan stop signals where the samples are peak detected (17) and stored (21). The ramp generator (11) outputs are divided into equal sections controlled by a precise crystal controlled oscillator (25). The stored signals are processed and compared to detect errors.

Abstract: A multiple range amplifier capable of providing a large number of ranges with great accuracy is provided by a circuit free of discrete resistors and which includes two inverting operational amplifiers and two, two-quadrant multiplying DACs which are externally controllable. The output of the first inverting amplifier is fed back through the first DAC and is also fed through the second DAC to the second inverting amplifier. Each of the DACs is externally controllable to provide the desired range with great precision. The gain of the system is the product of the gain of the two amplifiers. Also, a programmable filter is provided to optimize system performance, for example, in the removal of noise. This is accomplished by providing a fundamental filter circuit having an operational amplifier, a two quadrant multiplying DAC, a capacitor and several resistors. The output of the operational amplifier is fed back to the input via a capacitor and a DAC input control circuit and an RC circuit.