Patent ID: 6963246
Filing Date: 2005-11-08
Classification: H03F

Abstract:
1. A wideband amplifier including a first differential amplifier for providing amplified differential signals at first and second nodes in response to first and second differential input signals; and a second differential amplifier for ampli fying said ampli fied differential signals to provide differen tial output signals, which comprises: first and second phase compensation capacitors; a first source follower circuit including a first MOS transistor receiving said first differential input signal at a gate thereof and having the sources thereof connected to a first constant-current supply and to said second node via said first phase compensation capacitor; and a second source follower circuit including a second MOS transistor receiving said second differential input signal at a gate thereof and having the source thereof connected to a second constant-current supply and to said first node via said second phase compensation capacitor.