Transmitting and receiving digital and analog signals across an isolator using amplitude modulation

摘要

Various embodiments of systems for transmitting and receiving a plurality of signals across an isolation material are disclosed. In one embodiment, a first signal may be modulated into a first modulated signal. The first modulated signal is then modulated into a second modulated signal in accordance to a second signal using amplitude modulation. In another embodiment, a first signal and a second signal are modulated into a modulated signal before being modulated further using amplitude modulation. The detection of the modulated signal may be performed using a frequency detector and an amplitude detection circuit that are arranged in parallel. At least some of the apparatuses, circuits, systems and methods disclosed herein may be implemented using conventional CMOS design and manufacturing techniques to provide, for example, at least one or more integrated circuits.

主权项

1. An isolation device, comprising:
a first semiconductor die; a periodic wave generator formed within the first semiconductor die, the periodic wave generator configured to generate a periodic wave signal having a frequency in accordance with a digital signal; a mixer configured to modulate the periodic wave signal in accordance with an analog signal into a modulated pulse signal such that the modulated pulse signal has an amplitude substantially representative of the analog signal; a second semiconductor die located adjacent to but electrically isolated from the first semiconductor die; a transmitter circuit formed within the first semiconductor die, the transmitter circuit configured to transmit the modulated pulse signal to the second semiconductor die; a receiver circuit formed within the second semiconductor die, the receiver circuit configured to receive the modulated pulse signal from the first semiconductor die; a frequency detector circuit formed within the second semiconductor die, the frequency detector circuit being coupled to the receiver circuit and configured to demodulate the modulated pulse signal so as to regenerate the digital signal; and an amplitude detection circuit formed within the second semiconductor die, the amplitude detection circuit configured to demodulate the modulated pulse signal so as to regenerate the analog signal.