The superregenerative receiver (or detector) circuit is very different from a regenerative detector.
I described the second above.
The superregenerative detector is an oscillator interrupted by its own second feedback loop, or, by an external oscillator. The interruption frequency is often chosen to be above audio band. The detection principle consists in that when the RF oscillation starts after the interrupting pulse, the start begins either by noise (this is why the audio output typically is a strong noise), or, a RF signal from antenna. The varying RF signal (AM modulated) causes the oscillator output to be like a varying pulse width audio signal. Superregenerative detectors are sometimes used as the RF/audio gain is very high (1 million times) but the disadvantage is that they as oscillators radiate and interfere with other signals. To prevent such interference, a SR detector can be used after a RF preamplifier.
By a careful tuning on one side of a FM spectrum, a SR detector can demodulate NBFM but is not so good with a wideband FM.
SR detectors were popular when vacuum tubes and later RF transistors were expensive. Radio amateurs used them in simple receivers.