Patent ID: 9124370
Filing Date: 2015-09-01
Classification: H01S,H04B

Abstract:
1. A light emitting element drive circuit, comprising: a plurality of signal paths that respectively propagate a plurality of amplitude-modulated signals obtained by branching an input amplitude-modulated signal; a plurality of filters different in a frequency band to pass an amplitude-modulated signal; one or more amplifiers configured to amplify an amplitude-modulated signal; one or more delay circuits configured to delay an amplitude-modulated signal; and an addition circuit that adds a plurality of amplitude-modulated signals, the filter different in the frequency band being arranged in each of the plurality of signal paths, the delay circuit being arranged in one or more of the plurality of signal paths relatively low in the frequency band, the amplifier being arranged in one or more of the plurality of signal paths relatively high in the frequency band, an output end of each of the plurality of signal paths being coupled to the addition circuit, and the addition circuit adding an amplitude-modulated signal that propagates through one or more of the plurality of signal paths relatively high in the frequency band and is amplified by the amplifier, and an amplitude-modulated signal that propagates through one or more of the plurality of signal paths relatively low in the frequency band and is delayed by the delay circuit.