hello
I have a circuit
I thought I would be getting nothing but DC from the peak detectors. I have followed a schematic of a manufactured antenna analyser. when I use the oscilloscopes I get one DC and one AC. R5 is the unknown impedance. this is in place of an antenna. I have used the watt meter to find out if the circuit works. it seems to be ok. but to measure the voltages I want DC from the peak detectors to go into an mcp6002 op amp. this is a general op amp with 1MHz bandwidth. so it would have to be DC. high frequency (3-30MHz) would be going into the wheatstone bridge, antenna, from the antenna to the peak detectors that would put a DC signal into the amplifiers, then into an arduino to do some calculations and show results.
I get two DC and two AC. not sure what im doing wrong here. the rest of the circuit is an non-inverting amp. though I didn't think this would do much. each op amp circuit is exactly the same, connected after the capacitors shown. each peak detector has an amplifier.
so yeah, how do I get DC instead of AC?
any help would be great!
although I have just tried adding some more of the circuit that includes another capacitor and that seems to work?
I have a circuit
I thought I would be getting nothing but DC from the peak detectors. I have followed a schematic of a manufactured antenna analyser. when I use the oscilloscopes I get one DC and one AC. R5 is the unknown impedance. this is in place of an antenna. I have used the watt meter to find out if the circuit works. it seems to be ok. but to measure the voltages I want DC from the peak detectors to go into an mcp6002 op amp. this is a general op amp with 1MHz bandwidth. so it would have to be DC. high frequency (3-30MHz) would be going into the wheatstone bridge, antenna, from the antenna to the peak detectors that would put a DC signal into the amplifiers, then into an arduino to do some calculations and show results.
I get two DC and two AC. not sure what im doing wrong here. the rest of the circuit is an non-inverting amp. though I didn't think this would do much. each op amp circuit is exactly the same, connected after the capacitors shown. each peak detector has an amplifier.
so yeah, how do I get DC instead of AC?
any help would be great!
although I have just tried adding some more of the circuit that includes another capacitor and that seems to work?