Regulation circuit for bipolar voltage switching circuits having logic circuitry using a single error amplifier for regulation of both positive and negative voltages

U.S. Patent Number: 5739711

Abstract: A circuit suitable for use in a regulated bi-directional output power supply requiring controlled transitions between states, such as in a Battery Polarity Switch is provided to utilize many of the same circuit components in regulating both opposing polarities of the output signal. An exemplary circuit achieves use of a single error amplifier and pulse width modulator circuit to obtain both positive and negative regulation of the battery polarity switch output, along with controlled transition between the two states. In a specific embodiment a logic inverter allows the single pulse width modulator to control in both directions. A ramped reference fed to the error amplifier allows the same amplifier to control the transitions.

Inventors: Mandelcorn; Yehoshua (Dallas, TX)

Assignee: Lucent Technologies Inc. (Murray Hill, NJ)

Application Number: 08/566,325

Issued: 1998-04-14

Expired: 2006-04-14

Classes: 327/175 ; 327/132; 327/172; 332/110; 332/111

Field of search: 327/130,131,132,172,175 332/109,110,111

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