A　circuit　configuration　and　a　circuit　topological　family　of　differential　buck　dc-dc　chopper　mode　inverter　with　high-frequency　link　are　proposed　in　this　paper.　The　circuit　configuration,　the　topology　family,　the　instantaneous　output　voltage　and　the　capacitance　current　feedback　control　strategy,　the　steady　principle　characteristic,　and　the　design　criteria　for　the　key　circuit　parameters　are　fully　investigated　in　this　paper.　The　circuit　configuration　is　differentially　composed　of　two　identical　isolated　bidirectional　buck　dc-dc　choppers　with　the　same　input　and　output　LC　filters.　These　two　choppers　generate　unipolarity　sinusoidal　pulse　width　modulation　voltage　waveforms　with　positive　and　negative　half　low-frequency　cycle　separately.　Each　dc-dc　chopper　consists　of　high　frequency　inverter,　high　frequency　transformer,　and　high　frequency　rectifier.　The　circuit　topological　family　includes　six　circuit　topologies,　namely,　one-transistor　forward　mode,　push-pull　mode,　push-pull　forward　mode,　two-transistor　forward　mode,　half-bridge　mode,　and　full-bridge　mode.　Taking　one-transistor　mode　circuit　topology　as　example,　the　prototype　is　designed　and　implemented.　The　results　from　the　theoretical　analysis　and　principle　test　indicate　that　the　inverters　have　advantages　of　high　frequency　galvanic　isolation,　simple　topology,　bidirectional　power　flow,　single-stage　power　conversion,　high　conversion　efficiency,　high-quality　output　voltage　waveform,　and　strong　adaptability　to　various　loads.