High Bandwidth Differential Amplifier for Shock Experiments
We developed a high bandwidth differential amplifier for gas gun shock experiments. The circuit has a bandwidth up to 1 GHz, and is capable of measuring signals of ≤1.5 V with a common mode rejection of 250 V. Conductivity measurements of gas gun targets are measured by flowing high currents through the targets. The voltage is measured across the target using a technique similar to a four-point probe. Because of the design of the current source and load, the target voltage is approximately 250 V relative to ground. Since the expected voltage change in the target is < 1 V, the differential amplifier must have a large common mode rejection. Various amplifying designs are shown, although the increased amplification decreases bandwidth. Bench tests show that the amplifier can withstand significant common mode DC voltage and measure 10 ns, and 50 mV signals.
- Research Organization:
- Nevada Test Site (NTS), Mercury, NV (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- DOE Contract Number:
- DE-AC52-06NA25946
- OSTI ID:
- 1062999
- Report Number(s):
- DOE/NV/25946-1512
- Journal Information:
- Rev Sci Instrum, Proceedings of the 19th Topical Conference High-Temperature Plasma Diagnostics, Vol. 83, Issue 10; Conference: 19th Topical Conference; High-Temperature Plasma Diagnostics, Monterey, California, May 2012
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of Ultra-Low Noise, Wide Bandwidth, High Gain Transimpedance Amplifiers for Experimental and Commercial Detection Systems
Differential B-dot and D-dot monitors for current and voltage measurements on a 20-MA 3-MV pulsed-power accelerator.