专利名称：INTERMEDIATE-FREQUENCY AMPLIFIER
WITH WIDE-RANGE CONTINUOUSLYVARIABLE BANDWIDTH SELECTION
发明人：MICHAEL S. BALBES申请号：US3633119D申请日：19691224公开号：US3633119A公开日：19720104
摘要：A multistage intermediate-frequency amplifier whose bandwidth, loading andgain-bandwidth product are controlled electronically. Interstage coupling filters utilizevaractors in a circuit which allows the bandwidth to be varied by control of a singlecontrol voltage, while maintaining the center frequency of the band at a constantpredetermined value. Related semiconductor circuits automatically control the coupling,shape-factor and band-pass symmetry to optimum values for the selected bandwidth, asby varying the coupling coefficients and amplifier load impedances from the same controlvoltage.
申请人：MICRODYNE CORP.
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