Analogue signal paths
申请(专利)号： GB20170011162
专利号： GB2563093A 主分类号： H03F1/32 申请权利人： CIRRUS LOGIC
INTERNATIONAL SEMICONDUCTOR LIMITED 公开国代码： GB 优先权国家： US
摘 要：
An audio circuit 200 that receives a digital input 102 and produces an analogue
output 103. Between the input and output is a feedback path comprising an
analogue-to-digital conversion module 202 comprising an analogue-to-digital converter (ADC) 108; an analogue gain element 203; a digital gain element 204; and a gain controller 205 for controlling the analogue and digital gains applied based on the input signal. The forward signal path may comprise a: pre-distortion processing module 111; digital-to-analogue converter (DAC) 105; and an analogue amplifier 106 of variable gain. The gain controller may be configured to receive an indication of the analogue amplifiers gain. The gain controller may be configured to: receive an envelope signal indicative of an envelope value of the input signal: or receive a signal
upstream of a digital module (up-sampling module) to determine an envelope value therefrom to control gain. The analogue
申请日： 2017-07-11 公开公告日： 2018-12-05
分类号： H03F1/32;
H03F3/181
发明设计人： JOHN PAUL LESSO
申请国代码： GB
优先权： 20170602 US
201762514333
摘 要 附 图：
and digital gain may be variably selected by the gain controller such that the digital gain partly reverses the analogue gain. The ADC module may comprise at least one further ADC path configured to apply different amounts of analogue and digital gain then that of the other path(s). The output of the audio circuit may be coupled to a non-linear component or a drive a bridge-tied load. 主权项：
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Analogue signal paths
