Cryptotech AS is a Norwegian company developing a new generation of Cryptocurrency mining equipment
for Bitcoin and other currencies based on a proprietary ASIC mining chip.
UNIPOLAR LOGIC – and benefits for application to Bitcoin Mining ASIC
Conventional silicon CMOS logic utilizes both NMOS and PMOS transistors.
The logic circuits require a significant amount of registers to store values of logic output.
Cryptotech’s novel unipolar logic only utilizes one type of transistor – either NMOS or PMOS only.
In the case of silicon circuits, NMOS only is chosen for its much higher mobility compared to PMOS.
Manufacturing costs are lower since the fabrication is simplified (no need for doping of PMOS transistors).
The method Cryptotech employs in its unipolar logic enables a significant reduction in circuitry to implement certain logic functions.
Initial simulations comparing a series of CMOS inverter circuits to a series of unipolar inverter circuits at the same operating voltage, frequency and loads, indicate that up to 60% power reduction is realized for employing unipolar logic vs. CMOS logic for a similar amount of circuitry.
Other added benefits of our novel unipolar logic includes higher density (reduced circuitry for certain logic functions), resulting in 60-75% smaller die size for the same processing capability which translates directly into cost savings.
The first Cryptotech ASIC will be designed and fabricated on a 22nm SOI process.
The vast advantages of unipolar in terms of power, speed and density, enables Cryptotech to design ASICs at 1-2 technology nodes from the state-of-the-art nodes with far better cost-performance features than CMOS-based designs at the state-of-the-art nodes.
Cryptotech’s next ASICs in 2019 for X11 and Scrypt will be designed and fabricated on a 12nm SOI process.
Advantages to other 16nm-based cmos designs
0.022 J/GH compared to 0.062 J/GH (74% lower power) at low hash rate speeds
0.022 J/GH compared to 0.155 J/GH (85% lower power) at high hash rate speeds
50% the cost based on $/hash rate at low hash rate
10% the cost based on $/hash rate at highest hash rate (highest power density)
Over 6 times the frequency to attain same power density on chip
Over 10 times the hash rate (same chip size) to attain same power density on chip