HTC Corporation v Nokia Corporation

Contents Topic Paragraphs Introduction 1 The witnesses 2-8 Technical experts 2-5 Experts on US law 6-8 Technical background 9-48 Mobile telephone networks 10 Transceivers 11 Modulation 12-14 IQ modulators 15-16 Low-pass filters 17-18 Anti-aliasing filters 19 Transmit chain architecture 20-23 Filtering prior to modulation 24 Transistors 25-35 Current mirrors 36-38 Gilbert cells 39-44 Gilbert cells with current mirrors 45-48 The Patent 49-69 The claims 70-71 The person skilled in the art 72-73 Common general knowledge 74-75 Construction 76-86 Claims 1: general points 77 A modulator 78-81 A modulator using a Gilbert cell, the modulator comprising 82 A switching arrangement for coupling a carrier wave to the 83 modulator A driver arrangement to couple an information signal to the 84 modulator At least one low-pass filter arrangement located between the 85 pair of transistors To filter the information signal to the modulator before the 86 information signal is mixed with the carrier wave The prior art 87-112 Itakura 87-104 Tan 105-112 Novelty 113-119 Novelty of claim 1 over Itakura 114-118 Novelty of claim 6 over Itakura 119 Obviousness 120-136 The law 120-121 Obviousness of claim 1 122-135 Obviousness of claims 6 and 7 136 Infringement 137-147 HTC’s licence defence 148-188 Summary of conclusions 189