2 results about "Electronic oscillation" patented technology

The invention relates to the technical field of amplifiers, and discloses a frequency-adjustable electronic oscillation amplifier which comprises an amplifier and further comprises a protection assembly and a protection part, the protection assembly is arranged at the bottom of the amplifier, the protection part comprises a base located at the bottom of the amplifier, a protection plate is arranged in the base, a buffer pad is fixed to one side of the protection plate, and the buffer pad is fixed to the other side of the protection plate. The protection assembly further comprises a rotating part, the rotating part comprises a rotating sleeve rotationally connected to the inner top wall of the base, the outer side of the rotating sleeve is sleeved with a movable ring, and a connecting rod is fixed to the movable ring. The protection device has the beneficial effects that when the amplifier falls off from a table top, the protection assembly pops up outwards, the amplifier is included in the protection assembly to form physical buffering, the unfolded protection assembly can absorb a large amount of impact energy through the protection assembly, the situation that an amplifier shell directly collides with the ground is avoided, and therefore the amplifier can be protected.

This invention proposes an electronic-free oscillation circuit and a biomimetic heart based on pneumatic soft valves. The oscillation circuit includes at least three pneumatic soft valves connected in sequence. Each pneumatic soft valve includes: a valve body with a groove inside; a flexible cavity formed within the valve body and surrounding the groove; and a first flexible channel and a second flexible channel, both formed on the inner wall of the groove and connected by a flexible tube. The first flexible channel of all pneumatic soft valves is connected to the same air source. The second flexible channel of the preceding pneumatic soft valve in an adjacent pair of pneumatic soft valves is connected to the flexible cavity of the following pneumatic soft valve. The flexible cavity of the first pneumatic soft valve is connected to the second flexible channel of the last pneumatic soft valve through an input pipe. This invention achieves fully soft, electronic-free pneumatic circuit control and generates periodic oscillations using a single input.