Joerger Enterprises, Inc. has designed a VME motherboard that offers this capability. It is the Model VME-M. It is our intent to have this motherboard replace all our VME modules. That meant it must be powerful enough to handle sophisticated applications but in addition be inexpensive enough to handle less complicated functions. Daughter cards with ADC’s and DAC’s at speeds of over 100Mhz and resolutions of 16 bits, and cost effective ADC’s, DAC’s, counters, logic and stepping motor controllers for normal system operation are included. To accomplish this the motherboard is available in three versions. The fastest will handle up to four individual daughter cards. Each daughter card slot will have a FPGA and two high-speed SRAM’s. The motherboard handles the VME bus interface and all the digital logic and buses for the daughter cards. The daughter cards handle the application to be performed. They contain the programming chip for its array, the ADC’s, DAC’s and logic required and the front panel connections. Because everything is surfaced mounted density can be quite high. For applications that do not require this density the motherboard is available with only one daughter card slot. For the many cases where an array and memory are not required the motherboard is available that can accept four daughter cards but all the control will be done in the VME interface array. To make the module more useful it will interface with VME64x capability. The module will have power on extraction and insertion, 3.3 volts to handle the latest IC’s and a front panel JTAG connector. This means that the module can be programmed and re-programmed to handle the tasks the system requires. All the arrays are high capacity, will work at speed of over 150Mhz, contain PLL’s, internal memory, can perform high level logic and contain excess capacity. This means that in addition to handling its designed performance it can be re-programmed to handle additional customer requirements when required.
Daughter cards available:
Model ADC4/14, four individual, 125Mhz ADC’s with 14 bit resolution, high input impedance, single or differential inputs, full scale programmable input offset
Model AWG125/14, two individual, arbitrary wave form generators, DC to 125Mhz, 14 bit resolution, 5pV-sec glitch output, programmable output range
Model ADC125/16, two 125Mhz, 16 bit ADC’s, input bandwidth to 500Mhz, stabilized PLL & VCO controlled clock ideal for under sampling of an input signal and its high-speed carrier
Model ADC/DAC, 12 individual, 16 bit ADC’s, four individual, 16 bit DAC’s and three 16 bit up, down, preset counters for control applications